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Finding the Third Proportional to 8,489 and 12,715

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Solution

The third proportional to 8,489 and 12,715 is: 19,044.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,489 : 12,715 = 12,715 : x
  2. Step 2: Convert to fraction form
    8,489/12,715 = 12,715/x
  3. Step 3: Cross multiply
    8,489x = 12,715 × 12,715
  4. Step 4: Simplify right side
    8,489x = 161,671,225
  5. Step 5: Solve for x
    x = 161,671,225/8,489
  6. Step 6: Final answer
    x = 19,044.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.