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Finding the Fourth Proportional to 18,619.15, 27,913.02 and 8,081.23

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Solution

The fourth proportional to 18,619.15, 27,913.02 and 8,081.23 is: 12,115.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.15 : 27,913.02 = 8,081.23 : x
  2. Step 2: Convert to fraction form
    18,619.15/27,913.02 = 8,081.23/x
  3. Step 3: Cross multiply
    18,619.15x = 27,913.02 × 8,081.23
  4. Step 4: Simplify right side
    18,619.15x = 225,571,534.61
  5. Step 5: Solve for x
    x = 225,571,534.61/18,619.15
  6. Step 6: Final answer
    x = 12,115.03

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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.