The court heard that in July 2015, the victim had travelled by coach to London to meet up with Adeagbo, who she knew as Marvin.
Adeagbo had told the victim that they were going to go to the cinema but when they met at Victoria, he said he had forgotten his cinema card and they needed to go to his home in Peckham to pick it up.
She was taken to his flat where he suggested going to his bedroom to eat.
Once in the room, Adeagbo started to kiss her. He moved her against the wall and touched her sexually, attempting to undo her trousers. She tried to stop him, visibly distressed by the situation, but he carried on.
He then raped the victim before getting up and leaving the room.
The victim came forward to police to give a statement about what happened on January 8 2016 and Adeagbo was identified from information provided to police by the victim.
In January 2016, Adeagbo was arrested at his home in Peckham and he later denied the offence. He was bailed while an investigation was launched.
Following a “complex and lengthy” investigation, detectives were able to charge Adeagbo on August 10 2019.
He pleaded not guilty at the beginning of his trial at Inner London Crown Court on April 19, 2021, but was subsequently found guilty.
Detective Constable Benedict Harrington, of the South East Command Unit, said: “The sentencing today is the result of a complex and lengthy investigation spanning a number of years. I hope this shows that justice can be brought no matter the time that has passed and that victims should always feel able to speak up and come forwards to us.
"I hope the verdict brings the victim some closure after what has been a deeply upsetting and traumatising experience. She has stayed strong and supported the investigation and I commend her courage and bravery.
“The Met is absolutely committed to bringing justice to victims of sexual assault, and to making women and girls feel safe in London. Our teams stop at nothing to investigate reports of sexual offences and to provide support to victims.”