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Finding the Fourth Proportional to 18,191.70, 27,287.55 and 14,911.20

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Solution

The fourth proportional to 18,191.70, 27,287.55 and 14,911.20 is: 22,366.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,191.70 : 27,287.55 = 14,911.20 : x
  2. Step 2: Convert to fraction form
    18,191.70/27,287.55 = 14,911.20/x
  3. Step 3: Cross multiply
    18,191.70x = 27,287.55 × 14,911.20
  4. Step 4: Simplify right side
    18,191.70x = 406,890,115.56
  5. Step 5: Solve for x
    x = 406,890,115.56/18,191.70
  6. Step 6: Final answer
    x = 22,366.80

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Similar ratio
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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.