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Finding the Fourth Proportional to 18,912.67, 28,369.01 and 18,885.34

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Solution

The fourth proportional to 18,912.67, 28,369.01 and 18,885.34 is: 28,328.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,912.67 : 28,369.01 = 18,885.34 : x
  2. Step 2: Convert to fraction form
    18,912.67/28,369.01 = 18,885.34/x
  3. Step 3: Cross multiply
    18,912.67x = 28,369.01 × 18,885.34
  4. Step 4: Simplify right side
    18,912.67x = 535,758,163.04
  5. Step 5: Solve for x
    x = 535,758,163.04/18,912.67
  6. Step 6: Final answer
    x = 28,328.01

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.