Home / 20,942.38-28,900-11,382.04

Finding the Fourth Proportional to 20,942.38, 28,900 and 11,382.04

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Solution

The fourth proportional to 20,942.38, 28,900 and 11,382.04 is: 15,706.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.38 : 28,900 = 11,382.04 : x
  2. Step 2: Convert to fraction form
    20,942.38/28,900 = 11,382.04/x
  3. Step 3: Cross multiply
    20,942.38x = 28,900 × 11,382.04
  4. Step 4: Simplify right side
    20,942.38x = 328,940,956
  5. Step 5: Solve for x
    x = 328,940,956/20,942.38
  6. Step 6: Final answer
    x = 15,706.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.