Home / 3,138.24-4,331.12-2,003.95

Finding the Fourth Proportional to 3,138.24, 4,331.12 and 2,003.95

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Solution

The fourth proportional to 3,138.24, 4,331.12 and 2,003.95 is: 2,765.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.24 : 4,331.12 = 2,003.95 : x
  2. Step 2: Convert to fraction form
    3,138.24/4,331.12 = 2,003.95/x
  3. Step 3: Cross multiply
    3,138.24x = 4,331.12 × 2,003.95
  4. Step 4: Simplify right side
    3,138.24x = 8,679,347.92
  5. Step 5: Solve for x
    x = 8,679,347.92/3,138.24
  6. Step 6: Final answer
    x = 2,765.67

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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.