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Finding the Third Proportional to 15,115.50 and 30,879

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Solution

The third proportional to 15,115.50 and 30,879 is: 63,081.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,115.50 : 30,879 = 30,879 : x
  2. Step 2: Convert to fraction form
    15,115.50/30,879 = 30,879/x
  3. Step 3: Cross multiply
    15,115.50x = 30,879 × 30,879
  4. Step 4: Simplify right side
    15,115.50x = 953,512,641
  5. Step 5: Solve for x
    x = 953,512,641/15,115.50
  6. Step 6: Final answer
    x = 63,081.78

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.