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Finding the Fourth Proportional to 18,951.73, 28,434.89 and 7,262.21

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Solution

The fourth proportional to 18,951.73, 28,434.89 and 7,262.21 is: 10,896.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,951.73 : 28,434.89 = 7,262.21 : x
  2. Step 2: Convert to fraction form
    18,951.73/28,434.89 = 7,262.21/x
  3. Step 3: Cross multiply
    18,951.73x = 28,434.89 × 7,262.21
  4. Step 4: Simplify right side
    18,951.73x = 206,500,231.75
  5. Step 5: Solve for x
    x = 206,500,231.75/18,951.73
  6. Step 6: Final answer
    x = 10,896.12

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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.