The 26-year-old married man had first asked the girl to perform a sex act when she was just 12 years old, Wolverhampton Crown Court was told.
He was told he would have to serve an extended period on licence and banned from working with children for life.
Sultan admitted having illegal sex with two teenage girls - including the 13-year-old.
He was also sentenced for taking a third teenager from Telford to have sex with workers at a fish and chip shop.
Judge Michael Challinor told Ali Sultan he had known that the 16-year-old girl, who was being prostituted, was damaged, and that the other two victims were both young and vulnerable.
“The harm this sort of sexual activity causes is incalculable. I have seen with my own eyes what has happened to these girls,” he said.
Ali Sultan had pleaded guilty to being involved in sexually activity with the 13-year-old girl more than four years ago.
He also admitted sexual activity with a second girl in 2009, in the weeks leading up to her 16th birthday, and a charge of controlling the prostitution of a child.
Judge Challinor imposed an extended period of licence for an additional five years on Ali Sultan’s release from prison.
He was also banned for life from working with children and must be on the sex offenders’ register for life and was made the subject of a Sexual Offences Prevention Order until further notice.
Miss Deborah Gould, prosecuting, said the youngest victim met Ali Sultan when she was just 12 when he had asked her to perform a sex act.
She refused but later, when she was 13, the defendant took her in his car to a lay-by where he had slapped her and had sex with her.
Miss Gould said the 16-year-old victim had been groomed and exploited as a prostitute by two other men who were friends of the defendant.
He had twice been involved in taking her to a fish and chip shop in Hadley where she was sold for sex to several of the workers.
The third victim was taken into a house in Victoria Avenue, two doors from Ali Sultan’s home. He knew she was still 15 and gave her vodka, cider and cannabis before he had sex with her.
Shropshire Patriot says: In order to understand this issue it would be useful to read 'White Gold' by Giles Milton which gives an historical account of the sex-trafficking of White people by Muslim slave traders.