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Finding the Third Proportional to 8,515 and 12,475

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Solution

The third proportional to 8,515 and 12,475 is: 18,276.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,515 : 12,475 = 12,475 : x
  2. Step 2: Convert to fraction form
    8,515/12,475 = 12,475/x
  3. Step 3: Cross multiply
    8,515x = 12,475 × 12,475
  4. Step 4: Simplify right side
    8,515x = 155,625,625
  5. Step 5: Solve for x
    x = 155,625,625/8,515
  6. Step 6: Final answer
    x = 18,276.64

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.