Home / 3,939.75-5,435.91-3,100.59

Finding the Fourth Proportional to 3,939.75, 5,435.91 and 3,100.59

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Solution

The fourth proportional to 3,939.75, 5,435.91 and 3,100.59 is: 4,278.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.75 : 5,435.91 = 3,100.59 : x
  2. Step 2: Convert to fraction form
    3,939.75/5,435.91 = 3,100.59/x
  3. Step 3: Cross multiply
    3,939.75x = 5,435.91 × 3,100.59
  4. Step 4: Simplify right side
    3,939.75x = 16,854,528.19
  5. Step 5: Solve for x
    x = 16,854,528.19/3,939.75
  6. Step 6: Final answer
    x = 4,278.07

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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.