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Finding the Fourth Proportional to 5,697.97, 7,861.21 and 3,456

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Solution

The fourth proportional to 5,697.97, 7,861.21 and 3,456 is: 4,768.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,697.97 : 7,861.21 = 3,456 : x
  2. Step 2: Convert to fraction form
    5,697.97/7,861.21 = 3,456/x
  3. Step 3: Cross multiply
    5,697.97x = 7,861.21 × 3,456
  4. Step 4: Simplify right side
    5,697.97x = 27,168,333.12
  5. Step 5: Solve for x
    x = 27,168,333.12/5,697.97
  6. Step 6: Final answer
    x = 4,768.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.