Home / 3,139.70-4,331.40-2,020.22

Finding the Fourth Proportional to 3,139.70, 4,331.40 and 2,020.22

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Solution

The fourth proportional to 3,139.70, 4,331.40 and 2,020.22 is: 2,787.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.70 : 4,331.40 = 2,020.22 : x
  2. Step 2: Convert to fraction form
    3,139.70/4,331.40 = 2,020.22/x
  3. Step 3: Cross multiply
    3,139.70x = 4,331.40 × 2,020.22
  4. Step 4: Simplify right side
    3,139.70x = 8,750,380.91
  5. Step 5: Solve for x
    x = 8,750,380.91/3,139.70
  6. Step 6: Final answer
    x = 2,787.01

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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.