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Finding the Third Proportional to 6,780 and 8,999

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Solution

The third proportional to 6,780 and 8,999 is: 11,944.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,780 : 8,999 = 8,999 : x
  2. Step 2: Convert to fraction form
    6,780/8,999 = 8,999/x
  3. Step 3: Cross multiply
    6,780x = 8,999 × 8,999
  4. Step 4: Simplify right side
    6,780x = 80,982,001
  5. Step 5: Solve for x
    x = 80,982,001/6,780
  6. Step 6: Final answer
    x = 11,944.25

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.