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Finding the Fourth Proportional to 39.93, 59.85 and 31.92

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Solution

The fourth proportional to 39.93, 59.85 and 31.92 is: 47.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.93 : 59.85 = 31.92 : x
  2. Step 2: Convert to fraction form
    39.93/59.85 = 31.92/x
  3. Step 3: Cross multiply
    39.93x = 59.85 × 31.92
  4. Step 4: Simplify right side
    39.93x = 1,910.41
  5. Step 5: Solve for x
    x = 1,910.41/39.93
  6. Step 6: Final answer
    x = 47.84

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.