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Finding the Fourth Proportional to 5,642.80, 7,786.92 and 3,286.24

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Solution

The fourth proportional to 5,642.80, 7,786.92 and 3,286.24 is: 4,534.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,642.80 : 7,786.92 = 3,286.24 : x
  2. Step 2: Convert to fraction form
    5,642.80/7,786.92 = 3,286.24/x
  3. Step 3: Cross multiply
    5,642.80x = 7,786.92 × 3,286.24
  4. Step 4: Simplify right side
    5,642.80x = 25,589,687.98
  5. Step 5: Solve for x
    x = 25,589,687.98/5,642.80
  6. Step 6: Final answer
    x = 4,534.93

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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.