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Finding the Fourth Proportional to 5,413.70, 8,102.55 and 3,928.70

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Solution

The fourth proportional to 5,413.70, 8,102.55 and 3,928.70 is: 5,879.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,413.70 : 8,102.55 = 3,928.70 : x
  2. Step 2: Convert to fraction form
    5,413.70/8,102.55 = 3,928.70/x
  3. Step 3: Cross multiply
    5,413.70x = 8,102.55 × 3,928.70
  4. Step 4: Simplify right side
    5,413.70x = 31,832,488.19
  5. Step 5: Solve for x
    x = 31,832,488.19/5,413.70
  6. Step 6: Final answer
    x = 5,879.99

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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.