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Finding the Fourth Proportional to 22,448.85, 30,979.49 and 12,239.82

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Solution

The fourth proportional to 22,448.85, 30,979.49 and 12,239.82 is: 16,890.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,448.85 : 30,979.49 = 12,239.82 : x
  2. Step 2: Convert to fraction form
    22,448.85/30,979.49 = 12,239.82/x
  3. Step 3: Cross multiply
    22,448.85x = 30,979.49 × 12,239.82
  4. Step 4: Simplify right side
    22,448.85x = 379,183,381.29
  5. Step 5: Solve for x
    x = 379,183,381.29/22,448.85
  6. Step 6: Final answer
    x = 16,890.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.