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Finding the Fourth Proportional to 7,679.21, 11,520.12 and 2,413.21

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Solution

The fourth proportional to 7,679.21, 11,520.12 and 2,413.21 is: 3,620.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,679.21 : 11,520.12 = 2,413.21 : x
  2. Step 2: Convert to fraction form
    7,679.21/11,520.12 = 2,413.21/x
  3. Step 3: Cross multiply
    7,679.21x = 11,520.12 × 2,413.21
  4. Step 4: Simplify right side
    7,679.21x = 27,800,468.79
  5. Step 5: Solve for x
    x = 27,800,468.79/7,679.21
  6. Step 6: Final answer
    x = 3,620.23

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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.