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Finding the Third Proportional to 7,478 and 11,481

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Solution

The third proportional to 7,478 and 11,481 is: 17,626.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478 : 11,481 = 11,481 : x
  2. Step 2: Convert to fraction form
    7,478/11,481 = 11,481/x
  3. Step 3: Cross multiply
    7,478x = 11,481 × 11,481
  4. Step 4: Simplify right side
    7,478x = 131,813,361
  5. Step 5: Solve for x
    x = 131,813,361/7,478
  6. Step 6: Final answer
    x = 17,626.82

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.