Question

Find the fourth proportional to 5 ,6,10

Answer 1

Answer:

12

Step-by-step explanation:

1. 5/6= 10/x
2. 5x = 60
3. x = 60 ÷ 5 = 12

Answer 2

Answer:

The fourth proportional number to the series is 12.

Step-by-step explanation:

If two or more consecutive numbers in a series are said to be in proportion,  then it means that the said set of numbers is increasing or decreasing in the same ratio, and the ratio is said to be in direct proportion to each other.

Thus, this means that,

5:6::10: (?)

⇒ $\frac{5}{6} = \frac{10}{x}$ [x is the fourth number (let)]

⇒ 5x = 6 × 10

⇒ 5x = 60

⇒ x = 12

Conclusion:

Thus, the fourth proportional number to the series is 5:6::10:12.

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