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Finding the Third Proportional to 11,612 and 15,285

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Solution

The third proportional to 11,612 and 15,285 is: 20,119.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,612 : 15,285 = 15,285 : x
  2. Step 2: Convert to fraction form
    11,612/15,285 = 15,285/x
  3. Step 3: Cross multiply
    11,612x = 15,285 × 15,285
  4. Step 4: Simplify right side
    11,612x = 233,631,225
  5. Step 5: Solve for x
    x = 233,631,225/11,612
  6. Step 6: Final answer
    x = 20,119.81

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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.