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Finding the Third Proportional to 3,917 and 8,564

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Solution

The third proportional to 3,917 and 8,564 is: 18,724.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917 : 8,564 = 8,564 : x
  2. Step 2: Convert to fraction form
    3,917/8,564 = 8,564/x
  3. Step 3: Cross multiply
    3,917x = 8,564 × 8,564
  4. Step 4: Simplify right side
    3,917x = 73,342,096
  5. Step 5: Solve for x
    x = 73,342,096/3,917
  6. Step 6: Final answer
    x = 18,724.05

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.