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Finding the Fourth Proportional to 18,903.27, 28,318.01 and 13,896.41

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Solution

The fourth proportional to 18,903.27, 28,318.01 and 13,896.41 is: 20,817.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.27 : 28,318.01 = 13,896.41 : x
  2. Step 2: Convert to fraction form
    18,903.27/28,318.01 = 13,896.41/x
  3. Step 3: Cross multiply
    18,903.27x = 28,318.01 × 13,896.41
  4. Step 4: Simplify right side
    18,903.27x = 393,518,625.56
  5. Step 5: Solve for x
    x = 393,518,625.56/18,903.27
  6. Step 6: Final answer
    x = 20,817.49

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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.