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Finding the Third Proportional to 11,711.25 and 15,471

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Solution

The third proportional to 11,711.25 and 15,471 is: 20,437.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,711.25 : 15,471 = 15,471 : x
  2. Step 2: Convert to fraction form
    11,711.25/15,471 = 15,471/x
  3. Step 3: Cross multiply
    11,711.25x = 15,471 × 15,471
  4. Step 4: Simplify right side
    11,711.25x = 239,351,841
  5. Step 5: Solve for x
    x = 239,351,841/11,711.25
  6. Step 6: Final answer
    x = 20,437.77

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.