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Finding the Fourth Proportional to 42,387, 63,591.84 and 14,685

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Solution

The fourth proportional to 42,387, 63,591.84 and 14,685 is: 22,031.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,387 : 63,591.84 = 14,685 : x
  2. Step 2: Convert to fraction form
    42,387/63,591.84 = 14,685/x
  3. Step 3: Cross multiply
    42,387x = 63,591.84 × 14,685
  4. Step 4: Simplify right side
    42,387x = 933,846,170.40
  5. Step 5: Solve for x
    x = 933,846,170.40/42,387
  6. Step 6: Final answer
    x = 22,031.43

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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.