Home / 3,993.82-5,503.87-2,872.78

Finding the Fourth Proportional to 3,993.82, 5,503.87 and 2,872.78

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Solution

The fourth proportional to 3,993.82, 5,503.87 and 2,872.78 is: 3,958.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,993.82 : 5,503.87 = 2,872.78 : x
  2. Step 2: Convert to fraction form
    3,993.82/5,503.87 = 2,872.78/x
  3. Step 3: Cross multiply
    3,993.82x = 5,503.87 × 2,872.78
  4. Step 4: Simplify right side
    3,993.82x = 15,811,407.66
  5. Step 5: Solve for x
    x = 15,811,407.66/3,993.82
  6. Step 6: Final answer
    x = 3,958.97

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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.