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Finding the Third Proportional to 15,331 and 20,107

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Solution

The third proportional to 15,331 and 20,107 is: 26,370.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,331 : 20,107 = 20,107 : x
  2. Step 2: Convert to fraction form
    15,331/20,107 = 20,107/x
  3. Step 3: Cross multiply
    15,331x = 20,107 × 20,107
  4. Step 4: Simplify right side
    15,331x = 404,291,449
  5. Step 5: Solve for x
    x = 404,291,449/15,331
  6. Step 6: Final answer
    x = 26,370.85

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.