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Finding the Third Proportional to 8,631 and 9,909

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Solution

The third proportional to 8,631 and 9,909 is: 11,376.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631 : 9,909 = 9,909 : x
  2. Step 2: Convert to fraction form
    8,631/9,909 = 9,909/x
  3. Step 3: Cross multiply
    8,631x = 9,909 × 9,909
  4. Step 4: Simplify right side
    8,631x = 98,188,281
  5. Step 5: Solve for x
    x = 98,188,281/8,631
  6. Step 6: Final answer
    x = 11,376.23

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.