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Finding the Fourth Proportional to 7,940.34, 11,910.60 and 2,745

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Solution

The fourth proportional to 7,940.34, 11,910.60 and 2,745 is: 4,117.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,940.34 : 11,910.60 = 2,745 : x
  2. Step 2: Convert to fraction form
    7,940.34/11,910.60 = 2,745/x
  3. Step 3: Cross multiply
    7,940.34x = 11,910.60 × 2,745
  4. Step 4: Simplify right side
    7,940.34x = 32,694,597
  5. Step 5: Solve for x
    x = 32,694,597/7,940.34
  6. Step 6: Final answer
    x = 4,117.53

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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.