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Finding the Fourth Proportional to 5,679.12, 7,837.20 and 3,195.12

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Solution

The fourth proportional to 5,679.12, 7,837.20 and 3,195.12 is: 4,409.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.12 : 7,837.20 = 3,195.12 : x
  2. Step 2: Convert to fraction form
    5,679.12/7,837.20 = 3,195.12/x
  3. Step 3: Cross multiply
    5,679.12x = 7,837.20 × 3,195.12
  4. Step 4: Simplify right side
    5,679.12x = 25,040,794.46
  5. Step 5: Solve for x
    x = 25,040,794.46/5,679.12
  6. Step 6: Final answer
    x = 4,409.27

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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.