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Finding the Fourth Proportional to 18,451.12, 25,435.32 and 13,056.80

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Solution

The fourth proportional to 18,451.12, 25,435.32 and 13,056.80 is: 17,999.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,451.12 : 25,435.32 = 13,056.80 : x
  2. Step 2: Convert to fraction form
    18,451.12/25,435.32 = 13,056.80/x
  3. Step 3: Cross multiply
    18,451.12x = 25,435.32 × 13,056.80
  4. Step 4: Simplify right side
    18,451.12x = 332,103,710.04
  5. Step 5: Solve for x
    x = 332,103,710.04/18,451.12
  6. Step 6: Final answer
    x = 17,999.11

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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.