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Finding the Third Proportional to 11,515.50 and 18,366.75

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Solution

The third proportional to 11,515.50 and 18,366.75 is: 29,294.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,515.50 : 18,366.75 = 18,366.75 : x
  2. Step 2: Convert to fraction form
    11,515.50/18,366.75 = 18,366.75/x
  3. Step 3: Cross multiply
    11,515.50x = 18,366.75 × 18,366.75
  4. Step 4: Simplify right side
    11,515.50x = 337,337,505.56
  5. Step 5: Solve for x
    x = 337,337,505.56/11,515.50
  6. Step 6: Final answer
    x = 29,294.21

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.