Home / 12,209.08-18,313.62-3,891.65

Finding the Fourth Proportional to 12,209.08, 18,313.62 and 3,891.65

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Solution

The fourth proportional to 12,209.08, 18,313.62 and 3,891.65 is: 5,837.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,209.08 : 18,313.62 = 3,891.65 : x
  2. Step 2: Convert to fraction form
    12,209.08/18,313.62 = 3,891.65/x
  3. Step 3: Cross multiply
    12,209.08x = 18,313.62 × 3,891.65
  4. Step 4: Simplify right side
    12,209.08x = 71,270,107.70
  5. Step 5: Solve for x
    x = 71,270,107.70/12,209.08
  6. Step 6: Final answer
    x = 5,837.47

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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.