Home / 13,413.12-20,119.68-4,979.96

Finding the Fourth Proportional to 13,413.12, 20,119.68 and 4,979.96

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Solution

The fourth proportional to 13,413.12, 20,119.68 and 4,979.96 is: 7,469.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,413.12 : 20,119.68 = 4,979.96 : x
  2. Step 2: Convert to fraction form
    13,413.12/20,119.68 = 4,979.96/x
  3. Step 3: Cross multiply
    13,413.12x = 20,119.68 × 4,979.96
  4. Step 4: Simplify right side
    13,413.12x = 100,195,201.61
  5. Step 5: Solve for x
    x = 100,195,201.61/13,413.12
  6. Step 6: Final answer
    x = 7,469.94

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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.