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Finding the Fourth Proportional to 42.44, 63.64 and 13.92

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Solution

The fourth proportional to 42.44, 63.64 and 13.92 is: 20.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.44 : 63.64 = 13.92 : x
  2. Step 2: Convert to fraction form
    42.44/63.64 = 13.92/x
  3. Step 3: Cross multiply
    42.44x = 63.64 × 13.92
  4. Step 4: Simplify right side
    42.44x = 885.87
  5. Step 5: Solve for x
    x = 885.87/42.44
  6. Step 6: Final answer
    x = 20.87

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