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Finding the Third Proportional to 8,616 and 13,424

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Solution

The third proportional to 8,616 and 13,424 is: 20,915.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,616 : 13,424 = 13,424 : x
  2. Step 2: Convert to fraction form
    8,616/13,424 = 13,424/x
  3. Step 3: Cross multiply
    8,616x = 13,424 × 13,424
  4. Step 4: Simplify right side
    8,616x = 180,203,776
  5. Step 5: Solve for x
    x = 180,203,776/8,616
  6. Step 6: Final answer
    x = 20,915.02

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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.