Home / 5,278.75-7,912.42-3,431.19

Finding the Fourth Proportional to 5,278.75, 7,912.42 and 3,431.19

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Solution

The fourth proportional to 5,278.75, 7,912.42 and 3,431.19 is: 5,143.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.75 : 7,912.42 = 3,431.19 : x
  2. Step 2: Convert to fraction form
    5,278.75/7,912.42 = 3,431.19/x
  3. Step 3: Cross multiply
    5,278.75x = 7,912.42 × 3,431.19
  4. Step 4: Simplify right side
    5,278.75x = 27,149,016.38
  5. Step 5: Solve for x
    x = 27,149,016.38/5,278.75
  6. Step 6: Final answer
    x = 5,143.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.