Home / 3,947.04-5,446.89-2,178.68

Finding the Fourth Proportional to 3,947.04, 5,446.89 and 2,178.68

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Solution

The fourth proportional to 3,947.04, 5,446.89 and 2,178.68 is: 3,006.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.04 : 5,446.89 = 2,178.68 : x
  2. Step 2: Convert to fraction form
    3,947.04/5,446.89 = 2,178.68/x
  3. Step 3: Cross multiply
    3,947.04x = 5,446.89 × 2,178.68
  4. Step 4: Simplify right side
    3,947.04x = 11,867,003.07
  5. Step 5: Solve for x
    x = 11,867,003.07/3,947.04
  6. Step 6: Final answer
    x = 3,006.56

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1.5x scale

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.