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Finding the Fourth Proportional to 6,879.52, 10,319.68 and 2,719.20

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Solution

The fourth proportional to 6,879.52, 10,319.68 and 2,719.20 is: 4,078.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,879.52 : 10,319.68 = 2,719.20 : x
  2. Step 2: Convert to fraction form
    6,879.52/10,319.68 = 2,719.20/x
  3. Step 3: Cross multiply
    6,879.52x = 10,319.68 × 2,719.20
  4. Step 4: Simplify right side
    6,879.52x = 28,061,273.86
  5. Step 5: Solve for x
    x = 28,061,273.86/6,879.52
  6. Step 6: Final answer
    x = 4,078.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.