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Finding the Fourth Proportional to 13,057.12, 18,005.05 and 9,276.34

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Solution

The fourth proportional to 13,057.12, 18,005.05 and 9,276.34 is: 12,791.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,057.12 : 18,005.05 = 9,276.34 : x
  2. Step 2: Convert to fraction form
    13,057.12/18,005.05 = 9,276.34/x
  3. Step 3: Cross multiply
    13,057.12x = 18,005.05 × 9,276.34
  4. Step 4: Simplify right side
    13,057.12x = 167,020,965.52
  5. Step 5: Solve for x
    x = 167,020,965.52/13,057.12
  6. Step 6: Final answer
    x = 12,791.56

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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.