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Finding the Third Proportional to 7,143.75 and 11,376

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Solution

The third proportional to 7,143.75 and 11,376 is: 18,115.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.75 : 11,376 = 11,376 : x
  2. Step 2: Convert to fraction form
    7,143.75/11,376 = 11,376/x
  3. Step 3: Cross multiply
    7,143.75x = 11,376 × 11,376
  4. Step 4: Simplify right side
    7,143.75x = 129,413,376
  5. Step 5: Solve for x
    x = 129,413,376/7,143.75
  6. Step 6: Final answer
    x = 18,115.61

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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.