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Finding the Fourth Proportional to 25,421.18, 38,131.36 and 7,891.02

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Solution

The fourth proportional to 25,421.18, 38,131.36 and 7,891.02 is: 11,836.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,421.18 : 38,131.36 = 7,891.02 : x
  2. Step 2: Convert to fraction form
    25,421.18/38,131.36 = 7,891.02/x
  3. Step 3: Cross multiply
    25,421.18x = 38,131.36 × 7,891.02
  4. Step 4: Simplify right side
    25,421.18x = 300,895,304.66
  5. Step 5: Solve for x
    x = 300,895,304.66/25,421.18
  6. Step 6: Final answer
    x = 11,836.40

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.