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Finding the Fourth Proportional to 5,025.70, 6,940.89 and 3,919.78

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Solution

The fourth proportional to 5,025.70, 6,940.89 and 3,919.78 is: 5,413.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,025.70 : 6,940.89 = 3,919.78 : x
  2. Step 2: Convert to fraction form
    5,025.70/6,940.89 = 3,919.78/x
  3. Step 3: Cross multiply
    5,025.70x = 6,940.89 × 3,919.78
  4. Step 4: Simplify right side
    5,025.70x = 27,206,761.80
  5. Step 5: Solve for x
    x = 27,206,761.80/5,025.70
  6. Step 6: Final answer
    x = 5,413.53

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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.