Question

12. Find the value of 'x' in the following.
(i) 4:x:: 20:35 (ii) 2.5: 7.5 ::x: 10.5 (iii) x: 19 :: 142 : 71
(iv) 21:35:: 33 : x​

Answer 1

Answer:

1.

product of mean=product of extreme

4 x35=20x (x)

x=140x20

x=7

therefore,x=7

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Step-by-step explanation:

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Answer 2

(i)

4:x :: 20:35

4/x = 20/35

x = (4 × 35)/20 = 7

(ii)

2.5:7.5 :: x:10.5

2.5/7.5 = x/10.5

x = (2.5×10.5)/7.5 = 3.5

(iii)

x/19 = 142/71

x = (142 × 19)/71 = 38

(iv)

21/35 = 33/x

x = (33×35)/21 = 55