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Finding the Third Proportional to 18,869 and 39,287

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Solution

The third proportional to 18,869 and 39,287 is: 81,799.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869 : 39,287 = 39,287 : x
  2. Step 2: Convert to fraction form
    18,869/39,287 = 39,287/x
  3. Step 3: Cross multiply
    18,869x = 39,287 × 39,287
  4. Step 4: Simplify right side
    18,869x = 1,543,468,369
  5. Step 5: Solve for x
    x = 1,543,468,369/18,869
  6. Step 6: Final answer
    x = 81,799.16

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.