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Finding the Third Proportional to 20,167 and 31,331

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Solution

The third proportional to 20,167 and 31,331 is: 48,675.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,167 : 31,331 = 31,331 : x
  2. Step 2: Convert to fraction form
    20,167/31,331 = 31,331/x
  3. Step 3: Cross multiply
    20,167x = 31,331 × 31,331
  4. Step 4: Simplify right side
    20,167x = 981,631,561
  5. Step 5: Solve for x
    x = 981,631,561/20,167
  6. Step 6: Final answer
    x = 48,675.14

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.