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Finding the Fourth Proportional to 28,540.54, 42,804.06 and 8,819.20

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Solution

The fourth proportional to 28,540.54, 42,804.06 and 8,819.20 is: 13,226.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,540.54 : 42,804.06 = 8,819.20 : x
  2. Step 2: Convert to fraction form
    28,540.54/42,804.06 = 8,819.20/x
  3. Step 3: Cross multiply
    28,540.54x = 42,804.06 × 8,819.20
  4. Step 4: Simplify right side
    28,540.54x = 377,497,565.95
  5. Step 5: Solve for x
    x = 377,497,565.95/28,540.54
  6. Step 6: Final answer
    x = 13,226.71

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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.