Home / 3,989.26-5,512.78-2,992.82

Finding the Fourth Proportional to 3,989.26, 5,512.78 and 2,992.82

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Solution

The fourth proportional to 3,989.26, 5,512.78 and 2,992.82 is: 4,135.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.26 : 5,512.78 = 2,992.82 : x
  2. Step 2: Convert to fraction form
    3,989.26/5,512.78 = 2,992.82/x
  3. Step 3: Cross multiply
    3,989.26x = 5,512.78 × 2,992.82
  4. Step 4: Simplify right side
    3,989.26x = 16,498,758.24
  5. Step 5: Solve for x
    x = 16,498,758.24/3,989.26
  6. Step 6: Final answer
    x = 4,135.79

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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.