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Finding the Third Proportional to 3,126 and 8,151

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Solution

The third proportional to 3,126 and 8,151 is: 21,253.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126 : 8,151 = 8,151 : x
  2. Step 2: Convert to fraction form
    3,126/8,151 = 8,151/x
  3. Step 3: Cross multiply
    3,126x = 8,151 × 8,151
  4. Step 4: Simplify right side
    3,126x = 66,438,801
  5. Step 5: Solve for x
    x = 66,438,801/3,126
  6. Step 6: Final answer
    x = 21,253.62

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Why These Related Problems?

These problems maintain the same ratio (2.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.