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Finding the Fourth Proportional to 7,958.51, 11,939.21 and 3,516.17

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Solution

The fourth proportional to 7,958.51, 11,939.21 and 3,516.17 is: 5,274.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,958.51 : 11,939.21 = 3,516.17 : x
  2. Step 2: Convert to fraction form
    7,958.51/11,939.21 = 3,516.17/x
  3. Step 3: Cross multiply
    7,958.51x = 11,939.21 × 3,516.17
  4. Step 4: Simplify right side
    7,958.51x = 41,980,241.12
  5. Step 5: Solve for x
    x = 41,980,241.12/7,958.51
  6. Step 6: Final answer
    x = 5,274.89

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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.