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Finding the Fourth Proportional to 18,799.91, 28,199.90 and 7,704.62

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Solution

The fourth proportional to 18,799.91, 28,199.90 and 7,704.62 is: 11,556.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,799.91 : 28,199.90 = 7,704.62 : x
  2. Step 2: Convert to fraction form
    18,799.91/28,199.90 = 7,704.62/x
  3. Step 3: Cross multiply
    18,799.91x = 28,199.90 × 7,704.62
  4. Step 4: Simplify right side
    18,799.91x = 217,269,391.80
  5. Step 5: Solve for x
    x = 217,269,391.80/18,799.91
  6. Step 6: Final answer
    x = 11,556.94

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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.