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Finding the Fourth Proportional to 5,697.88, 7,862.96 and 3,213.88

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Solution

The fourth proportional to 5,697.88, 7,862.96 and 3,213.88 is: 4,435.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,697.88 : 7,862.96 = 3,213.88 : x
  2. Step 2: Convert to fraction form
    5,697.88/7,862.96 = 3,213.88/x
  3. Step 3: Cross multiply
    5,697.88x = 7,862.96 × 3,213.88
  4. Step 4: Simplify right side
    5,697.88x = 25,270,609.88
  5. Step 5: Solve for x
    x = 25,270,609.88/5,697.88
  6. Step 6: Final answer
    x = 4,435.09

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1.5x scale

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.