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Finding the Third Proportional to 8,115 and 12,531

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Solution

The third proportional to 8,115 and 12,531 is: 19,350.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115 : 12,531 = 12,531 : x
  2. Step 2: Convert to fraction form
    8,115/12,531 = 12,531/x
  3. Step 3: Cross multiply
    8,115x = 12,531 × 12,531
  4. Step 4: Simplify right side
    8,115x = 157,025,961
  5. Step 5: Solve for x
    x = 157,025,961/8,115
  6. Step 6: Final answer
    x = 19,350.09

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.