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Finding the Fourth Proportional to 8,398.38, 12,593.92 and 4,891.89

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Solution

The fourth proportional to 8,398.38, 12,593.92 and 4,891.89 is: 7,335.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,398.38 : 12,593.92 = 4,891.89 : x
  2. Step 2: Convert to fraction form
    8,398.38/12,593.92 = 4,891.89/x
  3. Step 3: Cross multiply
    8,398.38x = 12,593.92 × 4,891.89
  4. Step 4: Simplify right side
    8,398.38x = 61,608,071.31
  5. Step 5: Solve for x
    x = 61,608,071.31/8,398.38
  6. Step 6: Final answer
    x = 7,335.71

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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.