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Finding the Fourth Proportional to 20,676.73, 28,542 and 14,658.43

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Solution

The fourth proportional to 20,676.73, 28,542 and 14,658.43 is: 20,234.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,676.73 : 28,542 = 14,658.43 : x
  2. Step 2: Convert to fraction form
    20,676.73/28,542 = 14,658.43/x
  3. Step 3: Cross multiply
    20,676.73x = 28,542 × 14,658.43
  4. Step 4: Simplify right side
    20,676.73x = 418,380,909.06
  5. Step 5: Solve for x
    x = 418,380,909.06/20,676.73
  6. Step 6: Final answer
    x = 20,234.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.