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Finding the Fourth Proportional to 19,921.92, 29,882.90 and 8,222.28

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Solution

The fourth proportional to 19,921.92, 29,882.90 and 8,222.28 is: 12,333.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,921.92 : 29,882.90 = 8,222.28 : x
  2. Step 2: Convert to fraction form
    19,921.92/29,882.90 = 8,222.28/x
  3. Step 3: Cross multiply
    19,921.92x = 29,882.90 × 8,222.28
  4. Step 4: Simplify right side
    19,921.92x = 245,705,571.01
  5. Step 5: Solve for x
    x = 245,705,571.01/19,921.92
  6. Step 6: Final answer
    x = 12,333.43

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1.5x scale

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.