Home / 3,139.28-4,331.48-2,020.59

Finding the Fourth Proportional to 3,139.28, 4,331.48 and 2,020.59

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Solution

The fourth proportional to 3,139.28, 4,331.48 and 2,020.59 is: 2,787.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.28 : 4,331.48 = 2,020.59 : x
  2. Step 2: Convert to fraction form
    3,139.28/4,331.48 = 2,020.59/x
  3. Step 3: Cross multiply
    3,139.28x = 4,331.48 × 2,020.59
  4. Step 4: Simplify right side
    3,139.28x = 8,752,135.07
  5. Step 5: Solve for x
    x = 8,752,135.07/3,139.28
  6. Step 6: Final answer
    x = 2,787.95

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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.