Home / 20,382.24-30,579.84-12,993.12

Finding the Fourth Proportional to 20,382.24, 30,579.84 and 12,993.12

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Solution

The fourth proportional to 20,382.24, 30,579.84 and 12,993.12 is: 19,493.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,382.24 : 30,579.84 = 12,993.12 : x
  2. Step 2: Convert to fraction form
    20,382.24/30,579.84 = 12,993.12/x
  3. Step 3: Cross multiply
    20,382.24x = 30,579.84 × 12,993.12
  4. Step 4: Simplify right side
    20,382.24x = 397,327,530.70
  5. Step 5: Solve for x
    x = 397,327,530.70/20,382.24
  6. Step 6: Final answer
    x = 19,493.81

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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.