Home / 20,942.82-28,901.12-11,511.38

Finding the Fourth Proportional to 20,942.82, 28,901.12 and 11,511.38

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Solution

The fourth proportional to 20,942.82, 28,901.12 and 11,511.38 is: 15,885.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.82 : 28,901.12 = 11,511.38 : x
  2. Step 2: Convert to fraction form
    20,942.82/28,901.12 = 11,511.38/x
  3. Step 3: Cross multiply
    20,942.82x = 28,901.12 × 11,511.38
  4. Step 4: Simplify right side
    20,942.82x = 332,691,774.75
  5. Step 5: Solve for x
    x = 332,691,774.75/20,942.82
  6. Step 6: Final answer
    x = 15,885.72

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1.5x scale

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.