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Finding the Fourth Proportional to 22,326.88, 30,811.44 and 12,896.80

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Solution

The fourth proportional to 22,326.88, 30,811.44 and 12,896.80 is: 17,797.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,326.88 : 30,811.44 = 12,896.80 : x
  2. Step 2: Convert to fraction form
    22,326.88/30,811.44 = 12,896.80/x
  3. Step 3: Cross multiply
    22,326.88x = 30,811.44 × 12,896.80
  4. Step 4: Simplify right side
    22,326.88x = 397,368,979.39
  5. Step 5: Solve for x
    x = 397,368,979.39/22,326.88
  6. Step 6: Final answer
    x = 17,797.78

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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.