Home / 3,991.22-5,505.39-2,854.79

Finding the Fourth Proportional to 3,991.22, 5,505.39 and 2,854.79

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Solution

The fourth proportional to 3,991.22, 5,505.39 and 2,854.79 is: 3,937.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.22 : 5,505.39 = 2,854.79 : x
  2. Step 2: Convert to fraction form
    3,991.22/5,505.39 = 2,854.79/x
  3. Step 3: Cross multiply
    3,991.22x = 5,505.39 × 2,854.79
  4. Step 4: Simplify right side
    3,991.22x = 15,716,704.79
  5. Step 5: Solve for x
    x = 15,716,704.79/3,991.22
  6. Step 6: Final answer
    x = 3,937.82

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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.