Home / 3,719.12-5,129.70-3,158.70

Finding the Fourth Proportional to 3,719.12, 5,129.70 and 3,158.70

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Solution

The fourth proportional to 3,719.12, 5,129.70 and 3,158.70 is: 4,356.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,719.12 : 5,129.70 = 3,158.70 : x
  2. Step 2: Convert to fraction form
    3,719.12/5,129.70 = 3,158.70/x
  3. Step 3: Cross multiply
    3,719.12x = 5,129.70 × 3,158.70
  4. Step 4: Simplify right side
    3,719.12x = 16,203,183.39
  5. Step 5: Solve for x
    x = 16,203,183.39/3,719.12
  6. Step 6: Final answer
    x = 4,356.73

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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.