Home / 3,879.12-5,353.29-2,110.80

Finding the Fourth Proportional to 3,879.12, 5,353.29 and 2,110.80

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Solution

The fourth proportional to 3,879.12, 5,353.29 and 2,110.80 is: 2,912.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.12 : 5,353.29 = 2,110.80 : x
  2. Step 2: Convert to fraction form
    3,879.12/5,353.29 = 2,110.80/x
  3. Step 3: Cross multiply
    3,879.12x = 5,353.29 × 2,110.80
  4. Step 4: Simplify right side
    3,879.12x = 11,299,724.53
  5. Step 5: Solve for x
    x = 11,299,724.53/3,879.12
  6. Step 6: Final answer
    x = 2,912.96

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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.