Home / 5,105.57-7,658.36-2,639.12

Finding the Fourth Proportional to 5,105.57, 7,658.36 and 2,639.12

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Solution

The fourth proportional to 5,105.57, 7,658.36 and 2,639.12 is: 3,958.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105.57 : 7,658.36 = 2,639.12 : x
  2. Step 2: Convert to fraction form
    5,105.57/7,658.36 = 2,639.12/x
  3. Step 3: Cross multiply
    5,105.57x = 7,658.36 × 2,639.12
  4. Step 4: Simplify right side
    5,105.57x = 20,211,331.04
  5. Step 5: Solve for x
    x = 20,211,331.04/5,105.57
  6. Step 6: Final answer
    x = 3,958.68

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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.