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Finding the Fourth Proportional to 18,405.05, 27,613.64 and 8,544.11

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Solution

The fourth proportional to 18,405.05, 27,613.64 and 8,544.11 is: 12,818.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,405.05 : 27,613.64 = 8,544.11 : x
  2. Step 2: Convert to fraction form
    18,405.05/27,613.64 = 8,544.11/x
  3. Step 3: Cross multiply
    18,405.05x = 27,613.64 × 8,544.11
  4. Step 4: Simplify right side
    18,405.05x = 235,933,860.95
  5. Step 5: Solve for x
    x = 235,933,860.95/18,405.05
  6. Step 6: Final answer
    x = 12,818.98

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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.