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Finding the Third Proportional to 11,675.50 and 15,731

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Solution

The third proportional to 11,675.50 and 15,731 is: 21,195.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,675.50 : 15,731 = 15,731 : x
  2. Step 2: Convert to fraction form
    11,675.50/15,731 = 15,731/x
  3. Step 3: Cross multiply
    11,675.50x = 15,731 × 15,731
  4. Step 4: Simplify right side
    11,675.50x = 247,464,361
  5. Step 5: Solve for x
    x = 247,464,361/11,675.50
  6. Step 6: Final answer
    x = 21,195.18

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.