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Finding the Fourth Proportional to 18,878.94, 28,299.94 and 7,794.97

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Solution

The fourth proportional to 18,878.94, 28,299.94 and 7,794.97 is: 11,684.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.94 : 28,299.94 = 7,794.97 : x
  2. Step 2: Convert to fraction form
    18,878.94/28,299.94 = 7,794.97/x
  3. Step 3: Cross multiply
    18,878.94x = 28,299.94 × 7,794.97
  4. Step 4: Simplify right side
    18,878.94x = 220,597,093.06
  5. Step 5: Solve for x
    x = 220,597,093.06/18,878.94
  6. Step 6: Final answer
    x = 11,684.82

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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.