Home / 3,020.70-4,531.05-2,145.90

Finding the Fourth Proportional to 3,020.70, 4,531.05 and 2,145.90

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Solution

The fourth proportional to 3,020.70, 4,531.05 and 2,145.90 is: 3,218.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,020.70 : 4,531.05 = 2,145.90 : x
  2. Step 2: Convert to fraction form
    3,020.70/4,531.05 = 2,145.90/x
  3. Step 3: Cross multiply
    3,020.70x = 4,531.05 × 2,145.90
  4. Step 4: Simplify right side
    3,020.70x = 9,723,180.20
  5. Step 5: Solve for x
    x = 9,723,180.20/3,020.70
  6. Step 6: Final answer
    x = 3,218.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.