Home / 3,861.56-5,335.90-3,081.80

Finding the Fourth Proportional to 3,861.56, 5,335.90 and 3,081.80

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Solution

The fourth proportional to 3,861.56, 5,335.90 and 3,081.80 is: 4,258.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,861.56 : 5,335.90 = 3,081.80 : x
  2. Step 2: Convert to fraction form
    3,861.56/5,335.90 = 3,081.80/x
  3. Step 3: Cross multiply
    3,861.56x = 5,335.90 × 3,081.80
  4. Step 4: Simplify right side
    3,861.56x = 16,444,149.94
  5. Step 5: Solve for x
    x = 16,444,149.94/3,861.56
  6. Step 6: Final answer
    x = 4,258.43

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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.