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Finding the Fourth Proportional to 11,959.64, 17,939.50 and 4,163

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Solution

The fourth proportional to 11,959.64, 17,939.50 and 4,163 is: 6,244.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,959.64 : 17,939.50 = 4,163 : x
  2. Step 2: Convert to fraction form
    11,959.64/17,939.50 = 4,163/x
  3. Step 3: Cross multiply
    11,959.64x = 17,939.50 × 4,163
  4. Step 4: Simplify right side
    11,959.64x = 74,682,138.50
  5. Step 5: Solve for x
    x = 74,682,138.50/11,959.64
  6. Step 6: Final answer
    x = 6,244.51

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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.