Home / 3,138.29-4,330.85-1,811.99

Finding the Fourth Proportional to 3,138.29, 4,330.85 and 1,811.99

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Solution

The fourth proportional to 3,138.29, 4,330.85 and 1,811.99 is: 2,500.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.29 : 4,330.85 = 1,811.99 : x
  2. Step 2: Convert to fraction form
    3,138.29/4,330.85 = 1,811.99/x
  3. Step 3: Cross multiply
    3,138.29x = 4,330.85 × 1,811.99
  4. Step 4: Simplify right side
    3,138.29x = 7,847,439.77
  5. Step 5: Solve for x
    x = 7,847,439.77/3,138.29
  6. Step 6: Final answer
    x = 2,500.55

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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.