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Finding the Fourth Proportional to 18,922.82, 28,385.94 and 7,236.14

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Solution

The fourth proportional to 18,922.82, 28,385.94 and 7,236.14 is: 10,854.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,922.82 : 28,385.94 = 7,236.14 : x
  2. Step 2: Convert to fraction form
    18,922.82/28,385.94 = 7,236.14/x
  3. Step 3: Cross multiply
    18,922.82x = 28,385.94 × 7,236.14
  4. Step 4: Simplify right side
    18,922.82x = 205,404,635.87
  5. Step 5: Solve for x
    x = 205,404,635.87/18,922.82
  6. Step 6: Final answer
    x = 10,854.86

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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.