Home / 3,972.21-5,481.52-2,179.65

Finding the Fourth Proportional to 3,972.21, 5,481.52 and 2,179.65

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Solution

The fourth proportional to 3,972.21, 5,481.52 and 2,179.65 is: 3,007.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,972.21 : 5,481.52 = 2,179.65 : x
  2. Step 2: Convert to fraction form
    3,972.21/5,481.52 = 2,179.65/x
  3. Step 3: Cross multiply
    3,972.21x = 5,481.52 × 2,179.65
  4. Step 4: Simplify right side
    3,972.21x = 11,947,795.07
  5. Step 5: Solve for x
    x = 11,947,795.07/3,972.21
  6. Step 6: Final answer
    x = 3,007.85

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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.