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Finding the Third Proportional to 6,987 and 8,229

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Solution

The third proportional to 6,987 and 8,229 is: 9,691.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,987 : 8,229 = 8,229 : x
  2. Step 2: Convert to fraction form
    6,987/8,229 = 8,229/x
  3. Step 3: Cross multiply
    6,987x = 8,229 × 8,229
  4. Step 4: Simplify right side
    6,987x = 67,716,441
  5. Step 5: Solve for x
    x = 67,716,441/6,987
  6. Step 6: Final answer
    x = 9,691.78

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.