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Finding the Third Proportional to 18,663 and 39,909

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Solution

The third proportional to 18,663 and 39,909 is: 85,341.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,663 : 39,909 = 39,909 : x
  2. Step 2: Convert to fraction form
    18,663/39,909 = 39,909/x
  3. Step 3: Cross multiply
    18,663x = 39,909 × 39,909
  4. Step 4: Simplify right side
    18,663x = 1,592,728,281
  5. Step 5: Solve for x
    x = 1,592,728,281/18,663
  6. Step 6: Final answer
    x = 85,341.49

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.