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Finding the Fourth Proportional to 11,693.74, 16,137.36 and 6,388.56

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Solution

The fourth proportional to 11,693.74, 16,137.36 and 6,388.56 is: 8,816.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,693.74 : 16,137.36 = 6,388.56 : x
  2. Step 2: Convert to fraction form
    11,693.74/16,137.36 = 6,388.56/x
  3. Step 3: Cross multiply
    11,693.74x = 16,137.36 × 6,388.56
  4. Step 4: Simplify right side
    11,693.74x = 103,094,492.60
  5. Step 5: Solve for x
    x = 103,094,492.60/11,693.74
  6. Step 6: Final answer
    x = 8,816.21

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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.