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Finding the Fourth Proportional to 18,221.60, 27,333.92 and 13,351.84

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Solution

The fourth proportional to 18,221.60, 27,333.92 and 13,351.84 is: 20,028.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,221.60 : 27,333.92 = 13,351.84 : x
  2. Step 2: Convert to fraction form
    18,221.60/27,333.92 = 13,351.84/x
  3. Step 3: Cross multiply
    18,221.60x = 27,333.92 × 13,351.84
  4. Step 4: Simplify right side
    18,221.60x = 364,958,126.41
  5. Step 5: Solve for x
    x = 364,958,126.41/18,221.60
  6. Step 6: Final answer
    x = 20,028.87

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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.