Home / 5,413.60-8,121.60-4,247.20

Finding the Fourth Proportional to 5,413.60, 8,121.60 and 4,247.20

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Solution

The fourth proportional to 5,413.60, 8,121.60 and 4,247.20 is: 6,371.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,413.60 : 8,121.60 = 4,247.20 : x
  2. Step 2: Convert to fraction form
    5,413.60/8,121.60 = 4,247.20/x
  3. Step 3: Cross multiply
    5,413.60x = 8,121.60 × 4,247.20
  4. Step 4: Simplify right side
    5,413.60x = 34,494,059.52
  5. Step 5: Solve for x
    x = 34,494,059.52/5,413.60
  6. Step 6: Final answer
    x = 6,371.74

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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.