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Finding the Fourth Proportional to 18,619.08, 27,912.89 and 8,081.14

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Solution

The fourth proportional to 18,619.08, 27,912.89 and 8,081.14 is: 12,114.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.08 : 27,912.89 = 8,081.14 : x
  2. Step 2: Convert to fraction form
    18,619.08/27,912.89 = 8,081.14/x
  3. Step 3: Cross multiply
    18,619.08x = 27,912.89 × 8,081.14
  4. Step 4: Simplify right side
    18,619.08x = 225,567,832.33
  5. Step 5: Solve for x
    x = 225,567,832.33/18,619.08
  6. Step 6: Final answer
    x = 12,114.87

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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.