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Finding the Fourth Proportional to 28,344.83, 42,509.61 and 8,618.09

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Solution

The fourth proportional to 28,344.83, 42,509.61 and 8,618.09 is: 12,924.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,344.83 : 42,509.61 = 8,618.09 : x
  2. Step 2: Convert to fraction form
    28,344.83/42,509.61 = 8,618.09/x
  3. Step 3: Cross multiply
    28,344.83x = 42,509.61 × 8,618.09
  4. Step 4: Simplify right side
    28,344.83x = 366,351,432.30
  5. Step 5: Solve for x
    x = 366,351,432.30/28,344.83
  6. Step 6: Final answer
    x = 12,924.81

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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.