Home / 5,105.62-7,659.33-2,639.77

Finding the Fourth Proportional to 5,105.62, 7,659.33 and 2,639.77

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Solution

The fourth proportional to 5,105.62, 7,659.33 and 2,639.77 is: 3,960.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105.62 : 7,659.33 = 2,639.77 : x
  2. Step 2: Convert to fraction form
    5,105.62/7,659.33 = 2,639.77/x
  3. Step 3: Cross multiply
    5,105.62x = 7,659.33 × 2,639.77
  4. Step 4: Simplify right side
    5,105.62x = 20,218,869.55
  5. Step 5: Solve for x
    x = 20,218,869.55/5,105.62
  6. Step 6: Final answer
    x = 3,960.12

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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.