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Finding the Fourth Proportional to 22,479.75, 33,721.25 and 8,628.75

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Solution

The fourth proportional to 22,479.75, 33,721.25 and 8,628.75 is: 12,943.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,479.75 : 33,721.25 = 8,628.75 : x
  2. Step 2: Convert to fraction form
    22,479.75/33,721.25 = 8,628.75/x
  3. Step 3: Cross multiply
    22,479.75x = 33,721.25 × 8,628.75
  4. Step 4: Simplify right side
    22,479.75x = 290,972,192.79
  5. Step 5: Solve for x
    x = 290,972,192.79/22,479.75
  6. Step 6: Final answer
    x = 12,943.75

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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.