Home / 3,889.28-5,367.20-2,120.92

Finding the Fourth Proportional to 3,889.28, 5,367.20 and 2,120.92

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Solution

The fourth proportional to 3,889.28, 5,367.20 and 2,120.92 is: 2,926.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.28 : 5,367.20 = 2,120.92 : x
  2. Step 2: Convert to fraction form
    3,889.28/5,367.20 = 2,120.92/x
  3. Step 3: Cross multiply
    3,889.28x = 5,367.20 × 2,120.92
  4. Step 4: Simplify right side
    3,889.28x = 11,383,377.80
  5. Step 5: Solve for x
    x = 11,383,377.80/3,889.28
  6. Step 6: Final answer
    x = 2,926.86

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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.