Question

48. What should be added to each of 5, 13, 22 and 47
to make them proportional?
(a) 3 (b) 1 (c) 5
(c) 5 (d) 4​

Answer 1

Explanation:

let the added number be x

therefore, 5 + x / 13 + x = 22 + x / 47 + x

(13+x)(22+x)=(47+x)(5+x)

286 + 35x + x2 = 235 + 52x + x2

286 - 235 = 52x - 35x

51 = 17x

x = 3