Will parakets mate if ther is 3 other birds in the same cage?

Parakeets, if housed in single sex only, can mate and sometimes reproduce if an incubator for them, with perfect nesting temperatures inside are used.

Male parakeets can start reproducing at roughly four to five months, and continue laying eggs every one to four days with 3 or four days rest after two consecutive days. Once laid they will take anywhere from 16 to 38 days to hatch