Question

Three numbers are in the ratio 1 : 2 : 4. When 4 is added to each of these numbers

the ratio becomes 4 : 7 : 13. What is the sum of those numbers?

Answer 1

Here, x, 2x, 4x are supposed to be the no. ( from the ratio).
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Hope it'll help u...

Answer 2

Answer:

84

Step-by-step explanation:

x:2x:4x=1:2:4

(x+4):(2x+4):(4x+4)=1:2:4

$\frac{x+4}{2x+4}$=4/7

⇒7(x+4) = 4(2x+4)

⇒7x+28= 8x+16

⇒7x-8x = 16-28

⇒x=12

2x=2*12=24

4x=4*12=48

Sum of those no=12+24+48

                           =84

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