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Finding the Fourth Proportional to 31,850, 47,775 and 12,394

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Solution

The fourth proportional to 31,850, 47,775 and 12,394 is: 18,591

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,850 : 47,775 = 12,394 : x
  2. Step 2: Convert to fraction form
    31,850/47,775 = 12,394/x
  3. Step 3: Cross multiply
    31,850x = 47,775 × 12,394
  4. Step 4: Simplify right side
    31,850x = 592,123,350
  5. Step 5: Solve for x
    x = 592,123,350/31,850
  6. Step 6: Final answer
    x = 18,591

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Why These Related Problems?

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