Home / 3,972.18-5,481.40-2,179.62

Finding the Fourth Proportional to 3,972.18, 5,481.40 and 2,179.62

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Solution

The fourth proportional to 3,972.18, 5,481.40 and 2,179.62 is: 3,007.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,972.18 : 5,481.40 = 2,179.62 : x
  2. Step 2: Convert to fraction form
    3,972.18/5,481.40 = 2,179.62/x
  3. Step 3: Cross multiply
    3,972.18x = 5,481.40 × 2,179.62
  4. Step 4: Simplify right side
    3,972.18x = 11,947,369.07
  5. Step 5: Solve for x
    x = 11,947,369.07/3,972.18
  6. Step 6: Final answer
    x = 3,007.76

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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.