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Finding the Fourth Proportional to 18,691.69, 28,033.21 and 5,540.89

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Solution

The fourth proportional to 18,691.69, 28,033.21 and 5,540.89 is: 8,310.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,691.69 : 28,033.21 = 5,540.89 : x
  2. Step 2: Convert to fraction form
    18,691.69/28,033.21 = 5,540.89/x
  3. Step 3: Cross multiply
    18,691.69x = 28,033.21 × 5,540.89
  4. Step 4: Simplify right side
    18,691.69x = 155,328,765.09
  5. Step 5: Solve for x
    x = 155,328,765.09/18,691.69
  6. Step 6: Final answer
    x = 8,310.05

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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.