Home / 18,821.05-28,238.49-7,724.75

Finding the Fourth Proportional to 18,821.05, 28,238.49 and 7,724.75

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Solution

The fourth proportional to 18,821.05, 28,238.49 and 7,724.75 is: 11,589.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,821.05 : 28,238.49 = 7,724.75 : x
  2. Step 2: Convert to fraction form
    18,821.05/28,238.49 = 7,724.75/x
  3. Step 3: Cross multiply
    18,821.05x = 28,238.49 × 7,724.75
  4. Step 4: Simplify right side
    18,821.05x = 218,135,134.44
  5. Step 5: Solve for x
    x = 218,135,134.44/18,821.05
  6. Step 6: Final answer
    x = 11,589.96

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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.