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Finding the Third Proportional to 18,189 and 39,663

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Solution

The third proportional to 18,189 and 39,663 is: 86,489.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,189 : 39,663 = 39,663 : x
  2. Step 2: Convert to fraction form
    18,189/39,663 = 39,663/x
  3. Step 3: Cross multiply
    18,189x = 39,663 × 39,663
  4. Step 4: Simplify right side
    18,189x = 1,573,153,569
  5. Step 5: Solve for x
    x = 1,573,153,569/18,189
  6. Step 6: Final answer
    x = 86,489.28

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.