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Finding the Third Proportional to 7,478 and 11,529

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Solution

The third proportional to 7,478 and 11,529 is: 17,774.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478 : 11,529 = 11,529 : x
  2. Step 2: Convert to fraction form
    7,478/11,529 = 11,529/x
  3. Step 3: Cross multiply
    7,478x = 11,529 × 11,529
  4. Step 4: Simplify right side
    7,478x = 132,917,841
  5. Step 5: Solve for x
    x = 132,917,841/7,478
  6. Step 6: Final answer
    x = 17,774.52

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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.