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Finding the Fourth Proportional to 18,874.73, 28,324.86 and 7,187.65

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Solution

The fourth proportional to 18,874.73, 28,324.86 and 7,187.65 is: 10,786.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,874.73 : 28,324.86 = 7,187.65 : x
  2. Step 2: Convert to fraction form
    18,874.73/28,324.86 = 7,187.65/x
  3. Step 3: Cross multiply
    18,874.73x = 28,324.86 × 7,187.65
  4. Step 4: Simplify right side
    18,874.73x = 203,589,082.21
  5. Step 5: Solve for x
    x = 203,589,082.21/18,874.73
  6. Step 6: Final answer
    x = 10,786.33

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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.