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Finding the Third Proportional to 3,519 and 8,109

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Solution

The third proportional to 3,519 and 8,109 is: 18,685.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,519 : 8,109 = 8,109 : x
  2. Step 2: Convert to fraction form
    3,519/8,109 = 8,109/x
  3. Step 3: Cross multiply
    3,519x = 8,109 × 8,109
  4. Step 4: Simplify right side
    3,519x = 65,755,881
  5. Step 5: Solve for x
    x = 65,755,881/3,519
  6. Step 6: Final answer
    x = 18,685.96

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Why These Related Problems?

These problems maintain the same ratio (2.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.