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Finding the Fourth Proportional to 30,163.44, 45,230.81 and 12,391.33

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Solution

The fourth proportional to 30,163.44, 45,230.81 and 12,391.33 is: 18,581.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,163.44 : 45,230.81 = 12,391.33 : x
  2. Step 2: Convert to fraction form
    30,163.44/45,230.81 = 12,391.33/x
  3. Step 3: Cross multiply
    30,163.44x = 45,230.81 × 12,391.33
  4. Step 4: Simplify right side
    30,163.44x = 560,469,802.65
  5. Step 5: Solve for x
    x = 560,469,802.65/30,163.44
  6. Step 6: Final answer
    x = 18,581.10

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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.