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Finding the Fourth Proportional to 7,911.17, 11,872.59 and 3,751.17

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Solution

The fourth proportional to 7,911.17, 11,872.59 and 3,751.17 is: 5,629.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.17 : 11,872.59 = 3,751.17 : x
  2. Step 2: Convert to fraction form
    7,911.17/11,872.59 = 3,751.17/x
  3. Step 3: Cross multiply
    7,911.17x = 11,872.59 × 3,751.17
  4. Step 4: Simplify right side
    7,911.17x = 44,536,103.43
  5. Step 5: Solve for x
    x = 44,536,103.43/7,911.17
  6. Step 6: Final answer
    x = 5,629.52

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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.