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Finding the Third Proportional to 11,687 and 18,147

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Solution

The third proportional to 11,687 and 18,147 is: 28,177.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,687 : 18,147 = 18,147 : x
  2. Step 2: Convert to fraction form
    11,687/18,147 = 18,147/x
  3. Step 3: Cross multiply
    11,687x = 18,147 × 18,147
  4. Step 4: Simplify right side
    11,687x = 329,313,609
  5. Step 5: Solve for x
    x = 329,313,609/11,687
  6. Step 6: Final answer
    x = 28,177.77

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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.