Home / 3,967.21-5,474.37-2,198.78

Finding the Fourth Proportional to 3,967.21, 5,474.37 and 2,198.78

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Solution

The fourth proportional to 3,967.21, 5,474.37 and 2,198.78 is: 3,034.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,967.21 : 5,474.37 = 2,198.78 : x
  2. Step 2: Convert to fraction form
    3,967.21/5,474.37 = 2,198.78/x
  3. Step 3: Cross multiply
    3,967.21x = 5,474.37 × 2,198.78
  4. Step 4: Simplify right side
    3,967.21x = 12,036,910.65
  5. Step 5: Solve for x
    x = 12,036,910.65/3,967.21
  6. Step 6: Final answer
    x = 3,034.10

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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.