Home / 3,138.15-4,331.07-1,811.91

Finding the Fourth Proportional to 3,138.15, 4,331.07 and 1,811.91

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Solution

The fourth proportional to 3,138.15, 4,331.07 and 1,811.91 is: 2,500.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.15 : 4,331.07 = 1,811.91 : x
  2. Step 2: Convert to fraction form
    3,138.15/4,331.07 = 1,811.91/x
  3. Step 3: Cross multiply
    3,138.15x = 4,331.07 × 1,811.91
  4. Step 4: Simplify right side
    3,138.15x = 7,847,509.04
  5. Step 5: Solve for x
    x = 7,847,509.04/3,138.15
  6. Step 6: Final answer
    x = 2,500.68

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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.