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Finding the Fourth Proportional to 21,951.63, 30,295.49 and 12,519.99

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Solution

The fourth proportional to 21,951.63, 30,295.49 and 12,519.99 is: 17,278.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,951.63 : 30,295.49 = 12,519.99 : x
  2. Step 2: Convert to fraction form
    21,951.63/30,295.49 = 12,519.99/x
  3. Step 3: Cross multiply
    21,951.63x = 30,295.49 × 12,519.99
  4. Step 4: Simplify right side
    21,951.63x = 379,299,169.25
  5. Step 5: Solve for x
    x = 379,299,169.25/21,951.63
  6. Step 6: Final answer
    x = 17,278.86

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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.