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Finding the Fourth Proportional to 22,418.40, 33,627.60 and 20,728.80

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Solution

The fourth proportional to 22,418.40, 33,627.60 and 20,728.80 is: 31,093.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,418.40 : 33,627.60 = 20,728.80 : x
  2. Step 2: Convert to fraction form
    22,418.40/33,627.60 = 20,728.80/x
  3. Step 3: Cross multiply
    22,418.40x = 33,627.60 × 20,728.80
  4. Step 4: Simplify right side
    22,418.40x = 697,059,794.88
  5. Step 5: Solve for x
    x = 697,059,794.88/22,418.40
  6. Step 6: Final answer
    x = 31,093.20

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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.