Home / 3,947.37-5,447.14-2,178.87

Finding the Fourth Proportional to 3,947.37, 5,447.14 and 2,178.87

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Solution

The fourth proportional to 3,947.37, 5,447.14 and 2,178.87 is: 3,006.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.37 : 5,447.14 = 2,178.87 : x
  2. Step 2: Convert to fraction form
    3,947.37/5,447.14 = 2,178.87/x
  3. Step 3: Cross multiply
    3,947.37x = 5,447.14 × 2,178.87
  4. Step 4: Simplify right side
    3,947.37x = 11,868,609.93
  5. Step 5: Solve for x
    x = 11,868,609.93/3,947.37
  6. Step 6: Final answer
    x = 3,006.71

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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.