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Finding the Fourth Proportional to 18,808, 28,221.26 and 8,944.72

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Solution

The fourth proportional to 18,808, 28,221.26 and 8,944.72 is: 13,421.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808 : 28,221.26 = 8,944.72 : x
  2. Step 2: Convert to fraction form
    18,808/28,221.26 = 8,944.72/x
  3. Step 3: Cross multiply
    18,808x = 28,221.26 × 8,944.72
  4. Step 4: Simplify right side
    18,808x = 252,431,268.75
  5. Step 5: Solve for x
    x = 252,431,268.75/18,808
  6. Step 6: Final answer
    x = 13,421.48

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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.