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Finding the Fourth Proportional to 12,079.40, 18,112.95 and 5,057.51

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Solution

The fourth proportional to 12,079.40, 18,112.95 and 5,057.51 is: 7,583.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,079.40 : 18,112.95 = 5,057.51 : x
  2. Step 2: Convert to fraction form
    12,079.40/18,112.95 = 5,057.51/x
  3. Step 3: Cross multiply
    12,079.40x = 18,112.95 × 5,057.51
  4. Step 4: Simplify right side
    12,079.40x = 91,606,335.19
  5. Step 5: Solve for x
    x = 91,606,335.19/12,079.40
  6. Step 6: Final answer
    x = 7,583.69

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.