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Finding the Fourth Proportional to 13,356.90, 18,432.26 and 7,388.82

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Solution

The fourth proportional to 13,356.90, 18,432.26 and 7,388.82 is: 10,196.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,356.90 : 18,432.26 = 7,388.82 : x
  2. Step 2: Convert to fraction form
    13,356.90/18,432.26 = 7,388.82/x
  3. Step 3: Cross multiply
    13,356.90x = 18,432.26 × 7,388.82
  4. Step 4: Simplify right side
    13,356.90x = 136,192,642.10
  5. Step 5: Solve for x
    x = 136,192,642.10/13,356.90
  6. Step 6: Final answer
    x = 10,196.43

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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.