Home / 5,381.31-7,426.83-3,143.75

Finding the Fourth Proportional to 5,381.31, 7,426.83 and 3,143.75

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Solution

The fourth proportional to 5,381.31, 7,426.83 and 3,143.75 is: 4,338.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,381.31 : 7,426.83 = 3,143.75 : x
  2. Step 2: Convert to fraction form
    5,381.31/7,426.83 = 3,143.75/x
  3. Step 3: Cross multiply
    5,381.31x = 7,426.83 × 3,143.75
  4. Step 4: Simplify right side
    5,381.31x = 23,348,059.68
  5. Step 5: Solve for x
    x = 23,348,059.68/5,381.31
  6. Step 6: Final answer
    x = 4,338.73

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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.