Home / 3,947.25-5,447.18-2,178.86

Finding the Fourth Proportional to 3,947.25, 5,447.18 and 2,178.86

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Solution

The fourth proportional to 3,947.25, 5,447.18 and 2,178.86 is: 3,006.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.25 : 5,447.18 = 2,178.86 : x
  2. Step 2: Convert to fraction form
    3,947.25/5,447.18 = 2,178.86/x
  3. Step 3: Cross multiply
    3,947.25x = 5,447.18 × 2,178.86
  4. Step 4: Simplify right side
    3,947.25x = 11,868,608.57
  5. Step 5: Solve for x
    x = 11,868,608.57/3,947.25
  6. Step 6: Final answer
    x = 3,006.81

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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.