Home / 3,121.13-4,306.97-1,862.29

Finding the Fourth Proportional to 3,121.13, 4,306.97 and 1,862.29

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Solution

The fourth proportional to 3,121.13, 4,306.97 and 1,862.29 is: 2,569.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.13 : 4,306.97 = 1,862.29 : x
  2. Step 2: Convert to fraction form
    3,121.13/4,306.97 = 1,862.29/x
  3. Step 3: Cross multiply
    3,121.13x = 4,306.97 × 1,862.29
  4. Step 4: Simplify right side
    3,121.13x = 8,020,837.20
  5. Step 5: Solve for x
    x = 8,020,837.20/3,121.13
  6. Step 6: Final answer
    x = 2,569.85

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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.