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Finding the Fourth Proportional to 22,572.80, 33,859.20 and 18,879.20

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Solution

The fourth proportional to 22,572.80, 33,859.20 and 18,879.20 is: 28,318.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,572.80 : 33,859.20 = 18,879.20 : x
  2. Step 2: Convert to fraction form
    22,572.80/33,859.20 = 18,879.20/x
  3. Step 3: Cross multiply
    22,572.80x = 33,859.20 × 18,879.20
  4. Step 4: Simplify right side
    22,572.80x = 639,234,608.64
  5. Step 5: Solve for x
    x = 639,234,608.64/22,572.80
  6. Step 6: Final answer
    x = 28,318.80

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.