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Finding the Fourth Proportional to 21,923.92, 30,252.84 and 12,491.92

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Solution

The fourth proportional to 21,923.92, 30,252.84 and 12,491.92 is: 17,237.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,923.92 : 30,252.84 = 12,491.92 : x
  2. Step 2: Convert to fraction form
    21,923.92/30,252.84 = 12,491.92/x
  3. Step 3: Cross multiply
    21,923.92x = 30,252.84 × 12,491.92
  4. Step 4: Simplify right side
    21,923.92x = 377,916,057.05
  5. Step 5: Solve for x
    x = 377,916,057.05/21,923.92
  6. Step 6: Final answer
    x = 17,237.61

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1.5x scale

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.