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Finding the Third Proportional to 11,978 and 18,285

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Solution

The third proportional to 11,978 and 18,285 is: 27,912.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,978 : 18,285 = 18,285 : x
  2. Step 2: Convert to fraction form
    11,978/18,285 = 18,285/x
  3. Step 3: Cross multiply
    11,978x = 18,285 × 18,285
  4. Step 4: Simplify right side
    11,978x = 334,341,225
  5. Step 5: Solve for x
    x = 334,341,225/11,978
  6. Step 6: Final answer
    x = 27,912.94

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.