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Finding the Fourth Proportional to 18,919.94, 28,350.48 and 7,226.78

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Solution

The fourth proportional to 18,919.94, 28,350.48 and 7,226.78 is: 10,828.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.94 : 28,350.48 = 7,226.78 : x
  2. Step 2: Convert to fraction form
    18,919.94/28,350.48 = 7,226.78/x
  3. Step 3: Cross multiply
    18,919.94x = 28,350.48 × 7,226.78
  4. Step 4: Simplify right side
    18,919.94x = 204,882,681.85
  5. Step 5: Solve for x
    x = 204,882,681.85/18,919.94
  6. Step 6: Final answer
    x = 10,828.93

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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.