Question

Find x in the following proportion 1) 3:6::15:x 2) 11:14::x:56 3) 18:x::56:40 4) x:9::84:35

Answer 1

1) 3:6::15:x
   cross multiply
   3x = 16x5
   3x = 90
    x = 30

2)11:14::x:56 
    cross mulltiply
     14x = 616
      x = 44

3)18:x::56:40
    56x = 720
    x = 12.85

4) x:9::84:35
   35x = 756
   x = 21.6

Answer 2

1) 3/6 = 15/x
    X = 30

2) 11/14 = x/56
    X = 44

3) 18/x = 56/40
     X = 90/7  = 12.85

4) x/9 = 84/35 
    x = 21.6


Hope it helps.............