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Finding the Fourth Proportional to 18,619.29, 27,913.22 and 8,081.36

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Solution

The fourth proportional to 18,619.29, 27,913.22 and 8,081.36 is: 12,115.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.29 : 27,913.22 = 8,081.36 : x
  2. Step 2: Convert to fraction form
    18,619.29/27,913.22 = 8,081.36/x
  3. Step 3: Cross multiply
    18,619.29x = 27,913.22 × 8,081.36
  4. Step 4: Simplify right side
    18,619.29x = 225,576,883.34
  5. Step 5: Solve for x
    x = 225,576,883.34/18,619.29
  6. Step 6: Final answer
    x = 12,115.23

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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.