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Finding the Third Proportional to 8,613 and 11,689

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Solution

The third proportional to 8,613 and 11,689 is: 15,863.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613 : 11,689 = 11,689 : x
  2. Step 2: Convert to fraction form
    8,613/11,689 = 11,689/x
  3. Step 3: Cross multiply
    8,613x = 11,689 × 11,689
  4. Step 4: Simplify right side
    8,613x = 136,632,721
  5. Step 5: Solve for x
    x = 136,632,721/8,613
  6. Step 6: Final answer
    x = 15,863.55

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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.