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Finding the Third Proportional to 11,869 and 18,145

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Solution

The third proportional to 11,869 and 18,145 is: 27,739.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,869 : 18,145 = 18,145 : x
  2. Step 2: Convert to fraction form
    11,869/18,145 = 18,145/x
  3. Step 3: Cross multiply
    11,869x = 18,145 × 18,145
  4. Step 4: Simplify right side
    11,869x = 329,241,025
  5. Step 5: Solve for x
    x = 329,241,025/11,869
  6. Step 6: Final answer
    x = 27,739.58

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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.