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Finding the Third Proportional to 11,189 and 15,514

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Solution

The third proportional to 11,189 and 15,514 is: 21,510.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,189 : 15,514 = 15,514 : x
  2. Step 2: Convert to fraction form
    11,189/15,514 = 15,514/x
  3. Step 3: Cross multiply
    11,189x = 15,514 × 15,514
  4. Step 4: Simplify right side
    11,189x = 240,684,196
  5. Step 5: Solve for x
    x = 240,684,196/11,189
  6. Step 6: Final answer
    x = 21,510.79

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.