Home / 3,947.85-5,448.11-2,179.47

Finding the Fourth Proportional to 3,947.85, 5,448.11 and 2,179.47

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Solution

The fourth proportional to 3,947.85, 5,448.11 and 2,179.47 is: 3,007.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.85 : 5,448.11 = 2,179.47 : x
  2. Step 2: Convert to fraction form
    3,947.85/5,448.11 = 2,179.47/x
  3. Step 3: Cross multiply
    3,947.85x = 5,448.11 × 2,179.47
  4. Step 4: Simplify right side
    3,947.85x = 11,873,981.40
  5. Step 5: Solve for x
    x = 11,873,981.40/3,947.85
  6. Step 6: Final answer
    x = 3,007.71

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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.