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Finding the Fourth Proportional to 28,622.73, 42,958.80 and 19,863.80

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Solution

The fourth proportional to 28,622.73, 42,958.80 and 19,863.80 is: 29,812.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,622.73 : 42,958.80 = 19,863.80 : x
  2. Step 2: Convert to fraction form
    28,622.73/42,958.80 = 19,863.80/x
  3. Step 3: Cross multiply
    28,622.73x = 42,958.80 × 19,863.80
  4. Step 4: Simplify right side
    28,622.73x = 853,324,796.65
  5. Step 5: Solve for x
    x = 853,324,796.65/28,622.73
  6. Step 6: Final answer
    x = 29,812.84

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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.