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Finding the Third Proportional to 8,691 and 11,680.50

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Solution

The third proportional to 8,691 and 11,680.50 is: 15,698.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691 : 11,680.50 = 11,680.50 : x
  2. Step 2: Convert to fraction form
    8,691/11,680.50 = 11,680.50/x
  3. Step 3: Cross multiply
    8,691x = 11,680.50 × 11,680.50
  4. Step 4: Simplify right side
    8,691x = 136,434,080.25
  5. Step 5: Solve for x
    x = 136,434,080.25/8,691
  6. Step 6: Final answer
    x = 15,698.32

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.