Home / 5,711.92-7,880.13-3,721.75

Finding the Fourth Proportional to 5,711.92, 7,880.13 and 3,721.75

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Solution

The fourth proportional to 5,711.92, 7,880.13 and 3,721.75 is: 5,134.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,711.92 : 7,880.13 = 3,721.75 : x
  2. Step 2: Convert to fraction form
    5,711.92/7,880.13 = 3,721.75/x
  3. Step 3: Cross multiply
    5,711.92x = 7,880.13 × 3,721.75
  4. Step 4: Simplify right side
    5,711.92x = 29,327,873.83
  5. Step 5: Solve for x
    x = 29,327,873.83/5,711.92
  6. Step 6: Final answer
    x = 5,134.50

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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.