Home / 12,192.72-18,287.19-3,871.65

Finding the Fourth Proportional to 12,192.72, 18,287.19 and 3,871.65

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Solution

The fourth proportional to 12,192.72, 18,287.19 and 3,871.65 is: 5,806.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,192.72 : 18,287.19 = 3,871.65 : x
  2. Step 2: Convert to fraction form
    12,192.72/18,287.19 = 3,871.65/x
  3. Step 3: Cross multiply
    12,192.72x = 18,287.19 × 3,871.65
  4. Step 4: Simplify right side
    12,192.72x = 70,801,599.16
  5. Step 5: Solve for x
    x = 70,801,599.16/12,192.72
  6. Step 6: Final answer
    x = 5,806.87

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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.