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Finding the Fourth Proportional to 20,413.92, 30,601.44 and 8,711.04

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Solution

The fourth proportional to 20,413.92, 30,601.44 and 8,711.04 is: 13,058.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,413.92 : 30,601.44 = 8,711.04 : x
  2. Step 2: Convert to fraction form
    20,413.92/30,601.44 = 8,711.04/x
  3. Step 3: Cross multiply
    20,413.92x = 30,601.44 × 8,711.04
  4. Step 4: Simplify right side
    20,413.92x = 266,570,367.90
  5. Step 5: Solve for x
    x = 266,570,367.90/20,413.92
  6. Step 6: Final answer
    x = 13,058.26

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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.