Home / 5,129.46-7,080.48-3,139.56

Finding the Fourth Proportional to 5,129.46, 7,080.48 and 3,139.56

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Solution

The fourth proportional to 5,129.46, 7,080.48 and 3,139.56 is: 4,333.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.46 : 7,080.48 = 3,139.56 : x
  2. Step 2: Convert to fraction form
    5,129.46/7,080.48 = 3,139.56/x
  3. Step 3: Cross multiply
    5,129.46x = 7,080.48 × 3,139.56
  4. Step 4: Simplify right side
    5,129.46x = 22,229,591.79
  5. Step 5: Solve for x
    x = 22,229,591.79/5,129.46
  6. Step 6: Final answer
    x = 4,333.71

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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.