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Finding the Fourth Proportional to 22,413.20, 33,619.80 and 20,728.40

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Solution

The fourth proportional to 22,413.20, 33,619.80 and 20,728.40 is: 31,092.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,413.20 : 33,619.80 = 20,728.40 : x
  2. Step 2: Convert to fraction form
    22,413.20/33,619.80 = 20,728.40/x
  3. Step 3: Cross multiply
    22,413.20x = 33,619.80 × 20,728.40
  4. Step 4: Simplify right side
    22,413.20x = 696,884,662.32
  5. Step 5: Solve for x
    x = 696,884,662.32/22,413.20
  6. Step 6: Final answer
    x = 31,092.60

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Similar ratio
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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.