Home / 3,121.85-4,306.31-2,002.38

Finding the Fourth Proportional to 3,121.85, 4,306.31 and 2,002.38

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Solution

The fourth proportional to 3,121.85, 4,306.31 and 2,002.38 is: 2,762.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.85 : 4,306.31 = 2,002.38 : x
  2. Step 2: Convert to fraction form
    3,121.85/4,306.31 = 2,002.38/x
  3. Step 3: Cross multiply
    3,121.85x = 4,306.31 × 2,002.38
  4. Step 4: Simplify right side
    3,121.85x = 8,622,869.02
  5. Step 5: Solve for x
    x = 8,622,869.02/3,121.85
  6. Step 6: Final answer
    x = 2,762.10

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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.