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Finding the Fourth Proportional to 15,193.34, 20,965.93 and 8,478.44

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Solution

The fourth proportional to 15,193.34, 20,965.93 and 8,478.44 is: 11,699.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,193.34 : 20,965.93 = 8,478.44 : x
  2. Step 2: Convert to fraction form
    15,193.34/20,965.93 = 8,478.44/x
  3. Step 3: Cross multiply
    15,193.34x = 20,965.93 × 8,478.44
  4. Step 4: Simplify right side
    15,193.34x = 177,758,379.55
  5. Step 5: Solve for x
    x = 177,758,379.55/15,193.34
  6. Step 6: Final answer
    x = 11,699.76

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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.