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Finding the Fourth Proportional to 18,801.74, 28,198.01 and 8,274.42

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Solution

The fourth proportional to 18,801.74, 28,198.01 and 8,274.42 is: 12,409.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,801.74 : 28,198.01 = 8,274.42 : x
  2. Step 2: Convert to fraction form
    18,801.74/28,198.01 = 8,274.42/x
  3. Step 3: Cross multiply
    18,801.74x = 28,198.01 × 8,274.42
  4. Step 4: Simplify right side
    18,801.74x = 233,322,198.59
  5. Step 5: Solve for x
    x = 233,322,198.59/18,801.74
  6. Step 6: Final answer
    x = 12,409.61

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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.