Home / 3,947.30-5,447.22-2,178.87

Finding the Fourth Proportional to 3,947.30, 5,447.22 and 2,178.87

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Solution

The fourth proportional to 3,947.30, 5,447.22 and 2,178.87 is: 3,006.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.30 : 5,447.22 = 2,178.87 : x
  2. Step 2: Convert to fraction form
    3,947.30/5,447.22 = 2,178.87/x
  3. Step 3: Cross multiply
    3,947.30x = 5,447.22 × 2,178.87
  4. Step 4: Simplify right side
    3,947.30x = 11,868,784.24
  5. Step 5: Solve for x
    x = 11,868,784.24/3,947.30
  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.