Question

find the fourth proportional to the numbers 5,16,20,

Answer 1

Let fourth proportional  to the numbers 5, 16, 20 is x. So

5:16:20:x

⇒ 5x = 16×20           [ Product of extremes = Product of means ]

⇒  5x = 320

⇒ x = 320/5

⇒ x = 64

Hence fourth proportion is 64

Answer 2

Step-by-step explanation:

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