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Finding the Fourth Proportional to 28,351.22, 42,523.79 and 8,629.94

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Solution

The fourth proportional to 28,351.22, 42,523.79 and 8,629.94 is: 12,943.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,351.22 : 42,523.79 = 8,629.94 : x
  2. Step 2: Convert to fraction form
    28,351.22/42,523.79 = 8,629.94/x
  3. Step 3: Cross multiply
    28,351.22x = 42,523.79 × 8,629.94
  4. Step 4: Simplify right side
    28,351.22x = 366,977,819.43
  5. Step 5: Solve for x
    x = 366,977,819.43/28,351.22
  6. Step 6: Final answer
    x = 12,943.99

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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.