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Finding the Fourth Proportional to 11,959.12, 17,940.90 and 3,639.88

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Solution

The fourth proportional to 11,959.12, 17,940.90 and 3,639.88 is: 5,460.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,959.12 : 17,940.90 = 3,639.88 : x
  2. Step 2: Convert to fraction form
    11,959.12/17,940.90 = 3,639.88/x
  3. Step 3: Cross multiply
    11,959.12x = 17,940.90 × 3,639.88
  4. Step 4: Simplify right side
    11,959.12x = 65,302,723.09
  5. Step 5: Solve for x
    x = 65,302,723.09/11,959.12
  6. Step 6: Final answer
    x = 5,460.50

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Why These Related Problems?

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