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Finding the Third Proportional to 12,040.50 and 15,981

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Solution

The third proportional to 12,040.50 and 15,981 is: 21,211.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,040.50 : 15,981 = 15,981 : x
  2. Step 2: Convert to fraction form
    12,040.50/15,981 = 15,981/x
  3. Step 3: Cross multiply
    12,040.50x = 15,981 × 15,981
  4. Step 4: Simplify right side
    12,040.50x = 255,392,361
  5. Step 5: Solve for x
    x = 255,392,361/12,040.50
  6. Step 6: Final answer
    x = 21,211.11

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.