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Finding the Third Proportional to 12,190.50 and 15,651

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Solution

The third proportional to 12,190.50 and 15,651 is: 20,093.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.50 : 15,651 = 15,651 : x
  2. Step 2: Convert to fraction form
    12,190.50/15,651 = 15,651/x
  3. Step 3: Cross multiply
    12,190.50x = 15,651 × 15,651
  4. Step 4: Simplify right side
    12,190.50x = 244,953,801
  5. Step 5: Solve for x
    x = 244,953,801/12,190.50
  6. Step 6: Final answer
    x = 20,093.83

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.