Home / 3,879.10-5,353.08-2,110.75

Finding the Fourth Proportional to 3,879.10, 5,353.08 and 2,110.75

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Solution

The fourth proportional to 3,879.10, 5,353.08 and 2,110.75 is: 2,912.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.10 : 5,353.08 = 2,110.75 : x
  2. Step 2: Convert to fraction form
    3,879.10/5,353.08 = 2,110.75/x
  3. Step 3: Cross multiply
    3,879.10x = 5,353.08 × 2,110.75
  4. Step 4: Simplify right side
    3,879.10x = 11,299,013.61
  5. Step 5: Solve for x
    x = 11,299,013.61/3,879.10
  6. Step 6: Final answer
    x = 2,912.79

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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.