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Finding the Fourth Proportional to 11,958.59, 17,940.62 and 3,639.79

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Solution

The fourth proportional to 11,958.59, 17,940.62 and 3,639.79 is: 5,460.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,958.59 : 17,940.62 = 3,639.79 : x
  2. Step 2: Convert to fraction form
    11,958.59/17,940.62 = 3,639.79/x
  3. Step 3: Cross multiply
    11,958.59x = 17,940.62 × 3,639.79
  4. Step 4: Simplify right side
    11,958.59x = 65,299,981.37
  5. Step 5: Solve for x
    x = 65,299,981.37/11,958.59
  6. Step 6: Final answer
    x = 5,460.51

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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.