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Finding the Fourth Proportional to 18,392.02, 25,388.71 and 12,431.77

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Solution

The fourth proportional to 18,392.02, 25,388.71 and 12,431.77 is: 17,161.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,392.02 : 25,388.71 = 12,431.77 : x
  2. Step 2: Convert to fraction form
    18,392.02/25,388.71 = 12,431.77/x
  3. Step 3: Cross multiply
    18,392.02x = 25,388.71 × 12,431.77
  4. Step 4: Simplify right side
    18,392.02x = 315,626,459.95
  5. Step 5: Solve for x
    x = 315,626,459.95/18,392.02
  6. Step 6: Final answer
    x = 17,161.05

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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.