Home / 5,129.39-7,082.35-3,142.66

Finding the Fourth Proportional to 5,129.39, 7,082.35 and 3,142.66

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Solution

The fourth proportional to 5,129.39, 7,082.35 and 3,142.66 is: 4,339.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.39 : 7,082.35 = 3,142.66 : x
  2. Step 2: Convert to fraction form
    5,129.39/7,082.35 = 3,142.66/x
  3. Step 3: Cross multiply
    5,129.39x = 7,082.35 × 3,142.66
  4. Step 4: Simplify right side
    5,129.39x = 22,257,418.05
  5. Step 5: Solve for x
    x = 22,257,418.05/5,129.39
  6. Step 6: Final answer
    x = 4,339.19

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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.