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Finding the Fourth Proportional to 7,879.70, 11,819.50 and 4,545.79

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Solution

The fourth proportional to 7,879.70, 11,819.50 and 4,545.79 is: 6,818.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.70 : 11,819.50 = 4,545.79 : x
  2. Step 2: Convert to fraction form
    7,879.70/11,819.50 = 4,545.79/x
  3. Step 3: Cross multiply
    7,879.70x = 11,819.50 × 4,545.79
  4. Step 4: Simplify right side
    7,879.70x = 53,728,923.99
  5. Step 5: Solve for x
    x = 53,728,923.99/7,879.70
  6. Step 6: Final answer
    x = 6,818.66

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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.