Question

What should be added to the numbers 10,18,22,38 so that
they become proportional.​

Answer 1

Answer:

Answer is 2

Step-by-step explanation:

Suppose, the number is x

then we can write down that __

(10+x) : (18+x) :: (22+x) : (38+x)

or, 10+x / 18+x = 22+x / 38+x

or, 380+10x+38x+x^2 = 396+18x+22x+x^2

or, 380+48x=396+40x

or, 48x-40x=396-380

or, 8x= 16

or, x = 2

if we add 2 with each number then

10+2 : 18+2= 12:20= 2: 5

and, 22+2 : 38+2 = 24:40=2:5 [PROVED]

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