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Finding the Third Proportional to 3,951 and 7,137

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Solution

The third proportional to 3,951 and 7,137 is: 12,892.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951 : 7,137 = 7,137 : x
  2. Step 2: Convert to fraction form
    3,951/7,137 = 7,137/x
  3. Step 3: Cross multiply
    3,951x = 7,137 × 7,137
  4. Step 4: Simplify right side
    3,951x = 50,936,769
  5. Step 5: Solve for x
    x = 50,936,769/3,951
  6. Step 6: Final answer
    x = 12,892.12

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Why These Related Problems?

These problems maintain the same ratio (1.81) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.