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Finding the Third Proportional to 8,439 and 11,511

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Solution

The third proportional to 8,439 and 11,511 is: 15,701.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,439 : 11,511 = 11,511 : x
  2. Step 2: Convert to fraction form
    8,439/11,511 = 11,511/x
  3. Step 3: Cross multiply
    8,439x = 11,511 × 11,511
  4. Step 4: Simplify right side
    8,439x = 132,503,121
  5. Step 5: Solve for x
    x = 132,503,121/8,439
  6. Step 6: Final answer
    x = 15,701.28

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.