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Finding the Fourth Proportional to 7,879.32, 11,819.52 and 2,684.52

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Solution

The fourth proportional to 7,879.32, 11,819.52 and 2,684.52 is: 4,026.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.32 : 11,819.52 = 2,684.52 : x
  2. Step 2: Convert to fraction form
    7,879.32/11,819.52 = 2,684.52/x
  3. Step 3: Cross multiply
    7,879.32x = 11,819.52 × 2,684.52
  4. Step 4: Simplify right side
    7,879.32x = 31,729,737.83
  5. Step 5: Solve for x
    x = 31,729,737.83/7,879.32
  6. Step 6: Final answer
    x = 4,026.96

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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.