Question

What number should be added to each of the numbers 2,4,12 and 18 , so that they are in proportion?

Answer 1

Answer:

Let the no. Be 'x'

Now, According to question,

2+x : 4+x : : 12+x : 18+x

2+x/4+x = 12+x /18+ x

(2+x)(18+x) = (4+x)(12+x)

36+2x+18x+x^2=48+4x+12x+x^2

36+20x+x^2= 48+16x+x^2

36-48+20x-16x=0

-12+4x=0

4x=12

x=3. Ans. The required no. is 3.

Step-by-step explanation: