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Finding the Fourth Proportional to 28,911.94, 43,367.92 and 8,135.44

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Solution

The fourth proportional to 28,911.94, 43,367.92 and 8,135.44 is: 12,203.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,911.94 : 43,367.92 = 8,135.44 : x
  2. Step 2: Convert to fraction form
    28,911.94/43,367.92 = 8,135.44/x
  3. Step 3: Cross multiply
    28,911.94x = 43,367.92 × 8,135.44
  4. Step 4: Simplify right side
    28,911.94x = 352,816,982.33
  5. Step 5: Solve for x
    x = 352,816,982.33/28,911.94
  6. Step 6: Final answer
    x = 12,203.16

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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.