Home / 3,947.18-5,447.13-2,178.79

Finding the Fourth Proportional to 3,947.18, 5,447.13 and 2,178.79

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Solution

The fourth proportional to 3,947.18, 5,447.13 and 2,178.79 is: 3,006.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.18 : 5,447.13 = 2,178.79 : x
  2. Step 2: Convert to fraction form
    3,947.18/5,447.13 = 2,178.79/x
  3. Step 3: Cross multiply
    3,947.18x = 5,447.13 × 2,178.79
  4. Step 4: Simplify right side
    3,947.18x = 11,868,152.37
  5. Step 5: Solve for x
    x = 11,868,152.37/3,947.18
  6. Step 6: Final answer
    x = 3,006.74

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