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Finding the Fourth Proportional to 31.98, 47.91 and 14.85

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Solution

The fourth proportional to 31.98, 47.91 and 14.85 is: 22.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    31.98 : 47.91 = 14.85 : x
  2. Step 2: Convert to fraction form
    31.98/47.91 = 14.85/x
  3. Step 3: Cross multiply
    31.98x = 47.91 × 14.85
  4. Step 4: Simplify right side
    31.98x = 711.46
  5. Step 5: Solve for x
    x = 711.46/31.98
  6. Step 6: Final answer
    x = 22.25

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