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Finding the Third Proportional to 13,638.38 and 18,511.88

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Solution

The third proportional to 13,638.38 and 18,511.88 is: 25,126.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.38 : 18,511.88 = 18,511.88 : x
  2. Step 2: Convert to fraction form
    13,638.38/18,511.88 = 18,511.88/x
  3. Step 3: Cross multiply
    13,638.38x = 18,511.88 × 18,511.88
  4. Step 4: Simplify right side
    13,638.38x = 342,689,516.02
  5. Step 5: Solve for x
    x = 342,689,516.02/13,638.38
  6. Step 6: Final answer
    x = 25,126.86

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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.