Home / 12,120-18,180.22-3,799.83

Finding the Fourth Proportional to 12,120, 18,180.22 and 3,799.83

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Solution

The fourth proportional to 12,120, 18,180.22 and 3,799.83 is: 5,699.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120 : 18,180.22 = 3,799.83 : x
  2. Step 2: Convert to fraction form
    12,120/18,180.22 = 3,799.83/x
  3. Step 3: Cross multiply
    12,120x = 18,180.22 × 3,799.83
  4. Step 4: Simplify right side
    12,120x = 69,081,745.36
  5. Step 5: Solve for x
    x = 69,081,745.36/12,120
  6. Step 6: Final answer
    x = 5,699.81

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Similar ratio
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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.