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Finding the Third Proportional to 7,557.50 and 11,731

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Solution

The third proportional to 7,557.50 and 11,731 is: 18,209.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,557.50 : 11,731 = 11,731 : x
  2. Step 2: Convert to fraction form
    7,557.50/11,731 = 11,731/x
  3. Step 3: Cross multiply
    7,557.50x = 11,731 × 11,731
  4. Step 4: Simplify right side
    7,557.50x = 137,616,361
  5. Step 5: Solve for x
    x = 137,616,361/7,557.50
  6. Step 6: Final answer
    x = 18,209.24

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.