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Finding the Fourth Proportional to 18,296.49, 25,249.15 and 9,912.99

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Solution

The fourth proportional to 18,296.49, 25,249.15 and 9,912.99 is: 13,679.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,296.49 : 25,249.15 = 9,912.99 : x
  2. Step 2: Convert to fraction form
    18,296.49/25,249.15 = 9,912.99/x
  3. Step 3: Cross multiply
    18,296.49x = 25,249.15 × 9,912.99
  4. Step 4: Simplify right side
    18,296.49x = 250,294,546.68
  5. Step 5: Solve for x
    x = 250,294,546.68/18,296.49
  6. Step 6: Final answer
    x = 13,679.92

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Double scale
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Similar ratio
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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.