Sunny Islam, 23, who comes from a strict Muslim family, dragged his terrified victims – including a 15-year-old – from the street at knifepoint, bound and assaulted them during a two-month reign of terror.
Police fear that Islam may have attacked many more.
Three of the assaults took place close to his home in Barking, east London, while a fourth occurred in nearby Forest Gate.
Judge Patricia Lees, sentencing him to a minimum of 11 years, said: ‘The harm you have done to your victims is incalculable.
‘The nature and extent of these offences drives me to the conclusion that you represent an extreme and continuing danger to women, particularly those out at night.’
He was traced through the number plate of his girlfriend’s car after he kidnapped and raped the 15-year-old in September 2010.
He grabbed her from behind as she walked home with a friend and bundled her into the car at knifepoint before driving to a secluded spot where he raped her twice despite her claiming she was only 11 years old.
Judge Lees said: ‘You told her you were going to “teach her a lesson”, and similar things were said to the other women.
‘Those words are a chilling indictment of your very troubling attitude towards all of these victims.
‘You seem to observe women out at night as not deserving respect or protection.
‘I have no doubt that you were out that night looking for a victim, as you were on each of these occasions.’
The teen, who feared she would be murdered, was in court and smiled as her attacker was jailed.