Home / 3,911.72-5,399.17-2,418.75

Finding the Fourth Proportional to 3,911.72, 5,399.17 and 2,418.75

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Solution

The fourth proportional to 3,911.72, 5,399.17 and 2,418.75 is: 3,338.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.72 : 5,399.17 = 2,418.75 : x
  2. Step 2: Convert to fraction form
    3,911.72/5,399.17 = 2,418.75/x
  3. Step 3: Cross multiply
    3,911.72x = 5,399.17 × 2,418.75
  4. Step 4: Simplify right side
    3,911.72x = 13,059,236.39
  5. Step 5: Solve for x
    x = 13,059,236.39/3,911.72
  6. Step 6: Final answer
    x = 3,338.49

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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.