Home / 3,121.56-4,301.19-2,125.08

Finding the Fourth Proportional to 3,121.56, 4,301.19 and 2,125.08

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Solution

The fourth proportional to 3,121.56, 4,301.19 and 2,125.08 is: 2,928.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.56 : 4,301.19 = 2,125.08 : x
  2. Step 2: Convert to fraction form
    3,121.56/4,301.19 = 2,125.08/x
  3. Step 3: Cross multiply
    3,121.56x = 4,301.19 × 2,125.08
  4. Step 4: Simplify right side
    3,121.56x = 9,140,372.85
  5. Step 5: Solve for x
    x = 9,140,372.85/3,121.56
  6. Step 6: Final answer
    x = 2,928.14

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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.