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    Question

    What is the fourth proportion of 16, 20 and

    24?
    A 49 Correct Answer Incorrect Answer
    B 30 Correct Answer Incorrect Answer
    C 62 Correct Answer Incorrect Answer
    D 50 Correct Answer Incorrect Answer

    Solution

    We know the formula to find the fourth proportion - => a : b = c : d => 16 : 20 :: 24 : d => d = (24 ├Ч┬а20)/16 => d = 30

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