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Finding the Fourth Proportional to 21,805.20, 32,713.20 and 6,222.78

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Solution

The fourth proportional to 21,805.20, 32,713.20 and 6,222.78 is: 9,335.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,805.20 : 32,713.20 = 6,222.78 : x
  2. Step 2: Convert to fraction form
    21,805.20/32,713.20 = 6,222.78/x
  3. Step 3: Cross multiply
    21,805.20x = 32,713.20 × 6,222.78
  4. Step 4: Simplify right side
    21,805.20x = 203,567,046.70
  5. Step 5: Solve for x
    x = 203,567,046.70/21,805.20
  6. Step 6: Final answer
    x = 9,335.71

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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.