Home / 13,390.92-20,104.88-6,821.69

Finding the Fourth Proportional to 13,390.92, 20,104.88 and 6,821.69

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Solution

The fourth proportional to 13,390.92, 20,104.88 and 6,821.69 is: 10,241.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.92 : 20,104.88 = 6,821.69 : x
  2. Step 2: Convert to fraction form
    13,390.92/20,104.88 = 6,821.69/x
  3. Step 3: Cross multiply
    13,390.92x = 20,104.88 × 6,821.69
  4. Step 4: Simplify right side
    13,390.92x = 137,149,124.21
  5. Step 5: Solve for x
    x = 137,149,124.21/13,390.92
  6. Step 6: Final answer
    x = 10,241.95

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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.