Home / 12,640.28-18,964.26-8,949.65

Finding the Fourth Proportional to 12,640.28, 18,964.26 and 8,949.65

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Solution

The fourth proportional to 12,640.28, 18,964.26 and 8,949.65 is: 13,427.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.28 : 18,964.26 = 8,949.65 : x
  2. Step 2: Convert to fraction form
    12,640.28/18,964.26 = 8,949.65/x
  3. Step 3: Cross multiply
    12,640.28x = 18,964.26 × 8,949.65
  4. Step 4: Simplify right side
    12,640.28x = 169,723,394.69
  5. Step 5: Solve for x
    x = 169,723,394.69/12,640.28
  6. Step 6: Final answer
    x = 13,427.19

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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.