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Finding the Third Proportional to 13,638 and 18,328

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Solution

The third proportional to 13,638 and 18,328 is: 24,630.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638 : 18,328 = 18,328 : x
  2. Step 2: Convert to fraction form
    13,638/18,328 = 18,328/x
  3. Step 3: Cross multiply
    13,638x = 18,328 × 18,328
  4. Step 4: Simplify right side
    13,638x = 335,915,584
  5. Step 5: Solve for x
    x = 335,915,584/13,638
  6. Step 6: Final answer
    x = 24,630.85

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.