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Finding the Third Proportional to 18,745.50 and 28,311

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Solution

The third proportional to 18,745.50 and 28,311 is: 42,757.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,745.50 : 28,311 = 28,311 : x
  2. Step 2: Convert to fraction form
    18,745.50/28,311 = 28,311/x
  3. Step 3: Cross multiply
    18,745.50x = 28,311 × 28,311
  4. Step 4: Simplify right side
    18,745.50x = 801,512,721
  5. Step 5: Solve for x
    x = 801,512,721/18,745.50
  6. Step 6: Final answer
    x = 42,757.61

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.