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Finding the Third Proportional to 18,279 and 39,687

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Solution

The third proportional to 18,279 and 39,687 is: 86,167.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,279 : 39,687 = 39,687 : x
  2. Step 2: Convert to fraction form
    18,279/39,687 = 39,687/x
  3. Step 3: Cross multiply
    18,279x = 39,687 × 39,687
  4. Step 4: Simplify right side
    18,279x = 1,575,057,969
  5. Step 5: Solve for x
    x = 1,575,057,969/18,279
  6. Step 6: Final answer
    x = 86,167.62

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.