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Finding the Fourth Proportional to 18,662.25, 27,993.92 and 4,811.25

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Solution

The fourth proportional to 18,662.25, 27,993.92 and 4,811.25 is: 7,217.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,662.25 : 27,993.92 = 4,811.25 : x
  2. Step 2: Convert to fraction form
    18,662.25/27,993.92 = 4,811.25/x
  3. Step 3: Cross multiply
    18,662.25x = 27,993.92 × 4,811.25
  4. Step 4: Simplify right side
    18,662.25x = 134,685,723.54
  5. Step 5: Solve for x
    x = 134,685,723.54/18,662.25
  6. Step 6: Final answer
    x = 7,217.01

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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.