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Finding the Third Proportional to 6,478 and 8,785

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Solution

The third proportional to 6,478 and 8,785 is: 11,913.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,478 : 8,785 = 8,785 : x
  2. Step 2: Convert to fraction form
    6,478/8,785 = 8,785/x
  3. Step 3: Cross multiply
    6,478x = 8,785 × 8,785
  4. Step 4: Simplify right side
    6,478x = 77,176,225
  5. Step 5: Solve for x
    x = 77,176,225/6,478
  6. Step 6: Final answer
    x = 11,913.59

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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.