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Finding the Third Proportional to 8,634 and 18,909

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Solution

The third proportional to 8,634 and 18,909 is: 41,411.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,634 : 18,909 = 18,909 : x
  2. Step 2: Convert to fraction form
    8,634/18,909 = 18,909/x
  3. Step 3: Cross multiply
    8,634x = 18,909 × 18,909
  4. Step 4: Simplify right side
    8,634x = 357,550,281
  5. Step 5: Solve for x
    x = 357,550,281/8,634
  6. Step 6: Final answer
    x = 41,411.89

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.