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Finding the Fourth Proportional to 7,479.10, 11,230.80 and 5,413.60

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Solution

The fourth proportional to 7,479.10, 11,230.80 and 5,413.60 is: 8,129.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,479.10 : 11,230.80 = 5,413.60 : x
  2. Step 2: Convert to fraction form
    7,479.10/11,230.80 = 5,413.60/x
  3. Step 3: Cross multiply
    7,479.10x = 11,230.80 × 5,413.60
  4. Step 4: Simplify right side
    7,479.10x = 60,799,058.88
  5. Step 5: Solve for x
    x = 60,799,058.88/7,479.10
  6. Step 6: Final answer
    x = 8,129.19

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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.