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Finding the Fourth Proportional to 18,797.11, 28,201.20 and 5,651.50

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Solution

The fourth proportional to 18,797.11, 28,201.20 and 5,651.50 is: 8,478.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,797.11 : 28,201.20 = 5,651.50 : x
  2. Step 2: Convert to fraction form
    18,797.11/28,201.20 = 5,651.50/x
  3. Step 3: Cross multiply
    18,797.11x = 28,201.20 × 5,651.50
  4. Step 4: Simplify right side
    18,797.11x = 159,379,081.80
  5. Step 5: Solve for x
    x = 159,379,081.80/18,797.11
  6. Step 6: Final answer
    x = 8,478.91

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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.