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Finding the Fourth Proportional to 18,811.79, 28,207.66 and 6,327.66

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Solution

The fourth proportional to 18,811.79, 28,207.66 and 6,327.66 is: 9,488.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811.79 : 28,207.66 = 6,327.66 : x
  2. Step 2: Convert to fraction form
    18,811.79/28,207.66 = 6,327.66/x
  3. Step 3: Cross multiply
    18,811.79x = 28,207.66 × 6,327.66
  4. Step 4: Simplify right side
    18,811.79x = 178,488,481.88
  5. Step 5: Solve for x
    x = 178,488,481.88/18,811.79
  6. Step 6: Final answer
    x = 9,488.12

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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.