Home / 19,940.28-29,910.66-8,540.68

Finding the Fourth Proportional to 19,940.28, 29,910.66 and 8,540.68

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Solution

The fourth proportional to 19,940.28, 29,910.66 and 8,540.68 is: 12,811.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,940.28 : 29,910.66 = 8,540.68 : x
  2. Step 2: Convert to fraction form
    19,940.28/29,910.66 = 8,540.68/x
  3. Step 3: Cross multiply
    19,940.28x = 29,910.66 × 8,540.68
  4. Step 4: Simplify right side
    19,940.28x = 255,457,375.65
  5. Step 5: Solve for x
    x = 255,457,375.65/19,940.28
  6. Step 6: Final answer
    x = 12,811.12

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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.