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Find the Fourth Proportion to the Following: - ICSE Class 10 - Mathematics

Question

Find the fourth proportion to the following:

3,5 and 15

Solution

Let x be the fourth proportion to 3,5 and 15

3 : 5 :: 15 :  x

⇒ 3 × x = 5 × 15

⇒  x = (5 xx 15)/3

⇒  x = 25

The fourth proportion is 25.

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Frank Solution for Frank Class 10 Mathematics Part 2 (2016 to Current)
Chapter 9: Ratio and Proportion
Exercise 9.2 | Q: 2.1

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Solution Find the Fourth Proportion to the Following: Concept: Proportions.
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