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Finding the Third Proportional to 8,921 and 13,874

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Solution

The third proportional to 8,921 and 13,874 is: 21,576.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921 : 13,874 = 13,874 : x
  2. Step 2: Convert to fraction form
    8,921/13,874 = 13,874/x
  3. Step 3: Cross multiply
    8,921x = 13,874 × 13,874
  4. Step 4: Simplify right side
    8,921x = 192,487,876
  5. Step 5: Solve for x
    x = 192,487,876/8,921
  6. Step 6: Final answer
    x = 21,576.94

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.