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Finding the Fourth Proportional to 12,769.52, 17,621.72 and 7,180.40

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Solution

The fourth proportional to 12,769.52, 17,621.72 and 7,180.40 is: 9,908.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,769.52 : 17,621.72 = 7,180.40 : x
  2. Step 2: Convert to fraction form
    12,769.52/17,621.72 = 7,180.40/x
  3. Step 3: Cross multiply
    12,769.52x = 17,621.72 × 7,180.40
  4. Step 4: Simplify right side
    12,769.52x = 126,530,998.29
  5. Step 5: Solve for x
    x = 126,530,998.29/12,769.52
  6. Step 6: Final answer
    x = 9,908.83

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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.