Home / 3,879.19-5,353.25-2,110.80

Finding the Fourth Proportional to 3,879.19, 5,353.25 and 2,110.80

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Solution

The fourth proportional to 3,879.19, 5,353.25 and 2,110.80 is: 2,912.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.19 : 5,353.25 = 2,110.80 : x
  2. Step 2: Convert to fraction form
    3,879.19/5,353.25 = 2,110.80/x
  3. Step 3: Cross multiply
    3,879.19x = 5,353.25 × 2,110.80
  4. Step 4: Simplify right side
    3,879.19x = 11,299,640.10
  5. Step 5: Solve for x
    x = 11,299,640.10/3,879.19
  6. Step 6: Final answer
    x = 2,912.89

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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.