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Finding the Fourth Proportional to 18,758.07, 28,137.11 and 7,662.83

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Solution

The fourth proportional to 18,758.07, 28,137.11 and 7,662.83 is: 11,494.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.07 : 28,137.11 = 7,662.83 : x
  2. Step 2: Convert to fraction form
    18,758.07/28,137.11 = 7,662.83/x
  3. Step 3: Cross multiply
    18,758.07x = 28,137.11 × 7,662.83
  4. Step 4: Simplify right side
    18,758.07x = 215,609,711.62
  5. Step 5: Solve for x
    x = 215,609,711.62/18,758.07
  6. Step 6: Final answer
    x = 11,494.24

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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.