Home / 3,879.11-5,353.15-2,110.74

Finding the Fourth Proportional to 3,879.11, 5,353.15 and 2,110.74

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Solution

The fourth proportional to 3,879.11, 5,353.15 and 2,110.74 is: 2,912.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.11 : 5,353.15 = 2,110.74 : x
  2. Step 2: Convert to fraction form
    3,879.11/5,353.15 = 2,110.74/x
  3. Step 3: Cross multiply
    3,879.11x = 5,353.15 × 2,110.74
  4. Step 4: Simplify right side
    3,879.11x = 11,299,107.83
  5. Step 5: Solve for x
    x = 11,299,107.83/3,879.11
  6. Step 6: Final answer
    x = 2,912.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.