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Finding the Fourth Proportional to 12,138.80, 16,751.57 and 6,761.19

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Solution

The fourth proportional to 12,138.80, 16,751.57 and 6,761.19 is: 9,330.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.80 : 16,751.57 = 6,761.19 : x
  2. Step 2: Convert to fraction form
    12,138.80/16,751.57 = 6,761.19/x
  3. Step 3: Cross multiply
    12,138.80x = 16,751.57 × 6,761.19
  4. Step 4: Simplify right side
    12,138.80x = 113,260,589.45
  5. Step 5: Solve for x
    x = 113,260,589.45/12,138.80
  6. Step 6: Final answer
    x = 9,330.46

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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.