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Finding the Fourth Proportional to 7,959.88, 11,938.91 and 2,116.94

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Solution

The fourth proportional to 7,959.88, 11,938.91 and 2,116.94 is: 3,175.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.88 : 11,938.91 = 2,116.94 : x
  2. Step 2: Convert to fraction form
    7,959.88/11,938.91 = 2,116.94/x
  3. Step 3: Cross multiply
    7,959.88x = 11,938.91 × 2,116.94
  4. Step 4: Simplify right side
    7,959.88x = 25,273,956.14
  5. Step 5: Solve for x
    x = 25,273,956.14/7,959.88
  6. Step 6: Final answer
    x = 3,175.17

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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.