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Finding the Fourth Proportional to 18,472.20, 25,482.78 and 13,428.60

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Solution

The fourth proportional to 18,472.20, 25,482.78 and 13,428.60 is: 18,525.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,472.20 : 25,482.78 = 13,428.60 : x
  2. Step 2: Convert to fraction form
    18,472.20/25,482.78 = 13,428.60/x
  3. Step 3: Cross multiply
    18,472.20x = 25,482.78 × 13,428.60
  4. Step 4: Simplify right side
    18,472.20x = 342,198,059.51
  5. Step 5: Solve for x
    x = 342,198,059.51/18,472.20
  6. Step 6: Final answer
    x = 18,525.03

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