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Finding the Fourth Proportional to 18,178.65, 25,086.11 and 11,890.89

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Solution

The fourth proportional to 18,178.65, 25,086.11 and 11,890.89 is: 16,409.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,178.65 : 25,086.11 = 11,890.89 : x
  2. Step 2: Convert to fraction form
    18,178.65/25,086.11 = 11,890.89/x
  3. Step 3: Cross multiply
    18,178.65x = 25,086.11 × 11,890.89
  4. Step 4: Simplify right side
    18,178.65x = 298,296,115.08
  5. Step 5: Solve for x
    x = 298,296,115.08/18,178.65
  6. Step 6: Final answer
    x = 16,409.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.