Question

Find the 4th proportion of 25,30,16.
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Answer 1

Answer: 4th proportion = 19 1/5

Step-by-step explanation: 25:30::16:x

⇒ 25x = 16 × 30

⇒ 25x = 480

⇒ x = 480 ÷ 25

⇒ x = 96/5

⇒ x = 19 1/5

∴ The fourth proportion = 19 1/5

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96/5