Home / 3,947.18-5,447.06-2,178.74

Finding the Fourth Proportional to 3,947.18, 5,447.06 and 2,178.74

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Solution

The fourth proportional to 3,947.18, 5,447.06 and 2,178.74 is: 3,006.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.18 : 5,447.06 = 2,178.74 : x
  2. Step 2: Convert to fraction form
    3,947.18/5,447.06 = 2,178.74/x
  3. Step 3: Cross multiply
    3,947.18x = 5,447.06 × 2,178.74
  4. Step 4: Simplify right side
    3,947.18x = 11,867,727.50
  5. Step 5: Solve for x
    x = 11,867,727.50/3,947.18
  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.