Home / 18,896.20-28,355.10-7,217.80

Finding the Fourth Proportional to 18,896.20, 28,355.10 and 7,217.80

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Solution

The fourth proportional to 18,896.20, 28,355.10 and 7,217.80 is: 10,830.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,896.20 : 28,355.10 = 7,217.80 : x
  2. Step 2: Convert to fraction form
    18,896.20/28,355.10 = 7,217.80/x
  3. Step 3: Cross multiply
    18,896.20x = 28,355.10 × 7,217.80
  4. Step 4: Simplify right side
    18,896.20x = 204,661,440.78
  5. Step 5: Solve for x
    x = 204,661,440.78/18,896.20
  6. Step 6: Final answer
    x = 10,830.83

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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.