Home / 3,991.40-5,507.74-2,198.85

Finding the Fourth Proportional to 3,991.40, 5,507.74 and 2,198.85

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Solution

The fourth proportional to 3,991.40, 5,507.74 and 2,198.85 is: 3,034.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.40 : 5,507.74 = 2,198.85 : x
  2. Step 2: Convert to fraction form
    3,991.40/5,507.74 = 2,198.85/x
  3. Step 3: Cross multiply
    3,991.40x = 5,507.74 × 2,198.85
  4. Step 4: Simplify right side
    3,991.40x = 12,110,688.60
  5. Step 5: Solve for x
    x = 12,110,688.60/3,991.40
  6. Step 6: Final answer
    x = 3,034.20

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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.