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Finding the Fourth Proportional to 25,431.60, 38,113.92 and 12,259.92

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Solution

The fourth proportional to 25,431.60, 38,113.92 and 12,259.92 is: 18,373.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,431.60 : 38,113.92 = 12,259.92 : x
  2. Step 2: Convert to fraction form
    25,431.60/38,113.92 = 12,259.92/x
  3. Step 3: Cross multiply
    25,431.60x = 38,113.92 × 12,259.92
  4. Step 4: Simplify right side
    25,431.60x = 467,273,610.09
  5. Step 5: Solve for x
    x = 467,273,610.09/25,431.60
  6. Step 6: Final answer
    x = 18,373.74

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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.