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Finding the Third Proportional to 3,934 and 5,108

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Solution

The third proportional to 3,934 and 5,108 is: 6,632.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934 : 5,108 = 5,108 : x
  2. Step 2: Convert to fraction form
    3,934/5,108 = 5,108/x
  3. Step 3: Cross multiply
    3,934x = 5,108 × 5,108
  4. Step 4: Simplify right side
    3,934x = 26,091,664
  5. Step 5: Solve for x
    x = 26,091,664/3,934
  6. Step 6: Final answer
    x = 6,632.35

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.