Question

Find the value of x if. (a) 7 : 3 : : 42 : x​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Concept: Anything written in the form of a:b::c:d

can be written as (a/b = c/d) as we know by the concept of ratio and proportions.

Solution :

• 7:3::42:x can be written as 7/3 = 42/x
• Solving further we get, x = (42×3)/7 = 18

Answer: Value of x is 18