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Finding the Third Proportional to 3,934 and 9,105

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Solution

The third proportional to 3,934 and 9,105 is: 21,072.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934 : 9,105 = 9,105 : x
  2. Step 2: Convert to fraction form
    3,934/9,105 = 9,105/x
  3. Step 3: Cross multiply
    3,934x = 9,105 × 9,105
  4. Step 4: Simplify right side
    3,934x = 82,901,025
  5. Step 5: Solve for x
    x = 82,901,025/3,934
  6. Step 6: Final answer
    x = 21,072.96

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.