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Finding the Fourth Proportional to 11,958.71, 17,938.13 and 3,638.79

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Solution

The fourth proportional to 11,958.71, 17,938.13 and 3,638.79 is: 5,458.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,958.71 : 17,938.13 = 3,638.79 : x
  2. Step 2: Convert to fraction form
    11,958.71/17,938.13 = 3,638.79/x
  3. Step 3: Cross multiply
    11,958.71x = 17,938.13 × 3,638.79
  4. Step 4: Simplify right side
    11,958.71x = 65,273,069.87
  5. Step 5: Solve for x
    x = 65,273,069.87/11,958.71
  6. Step 6: Final answer
    x = 5,458.21

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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.