Home / 12,286.18-18,431.09-3,964.65

Finding the Fourth Proportional to 12,286.18, 18,431.09 and 3,964.65

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Solution

The fourth proportional to 12,286.18, 18,431.09 and 3,964.65 is: 5,947.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,286.18 : 18,431.09 = 3,964.65 : x
  2. Step 2: Convert to fraction form
    12,286.18/18,431.09 = 3,964.65/x
  3. Step 3: Cross multiply
    12,286.18x = 18,431.09 × 3,964.65
  4. Step 4: Simplify right side
    12,286.18x = 73,072,769.20
  5. Step 5: Solve for x
    x = 73,072,769.20/12,286.18
  6. Step 6: Final answer
    x = 5,947.56

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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.