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Finding the Fourth Proportional to 7,879.37, 11,821.77 and 3,499.89

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Solution

The fourth proportional to 7,879.37, 11,821.77 and 3,499.89 is: 5,251.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.37 : 11,821.77 = 3,499.89 : x
  2. Step 2: Convert to fraction form
    7,879.37/11,821.77 = 3,499.89/x
  3. Step 3: Cross multiply
    7,879.37x = 11,821.77 × 3,499.89
  4. Step 4: Simplify right side
    7,879.37x = 41,374,894.61
  5. Step 5: Solve for x
    x = 41,374,894.61/7,879.37
  6. Step 6: Final answer
    x = 5,251.04

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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.