Home / 3,947.11-5,447.03-2,178.71

Finding the Fourth Proportional to 3,947.11, 5,447.03 and 2,178.71

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Solution

The fourth proportional to 3,947.11, 5,447.03 and 2,178.71 is: 3,006.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.11 : 5,447.03 = 2,178.71 : x
  2. Step 2: Convert to fraction form
    3,947.11/5,447.03 = 2,178.71/x
  3. Step 3: Cross multiply
    3,947.11x = 5,447.03 × 2,178.71
  4. Step 4: Simplify right side
    3,947.11x = 11,867,498.73
  5. Step 5: Solve for x
    x = 11,867,498.73/3,947.11
  6. Step 6: Final answer
    x = 3,006.63

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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.