Home / 6,678.82-9,216.72-3,991.26

Finding the Fourth Proportional to 6,678.82, 9,216.72 and 3,991.26

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Solution

The fourth proportional to 6,678.82, 9,216.72 and 3,991.26 is: 5,507.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,678.82 : 9,216.72 = 3,991.26 : x
  2. Step 2: Convert to fraction form
    6,678.82/9,216.72 = 3,991.26/x
  3. Step 3: Cross multiply
    6,678.82x = 9,216.72 × 3,991.26
  4. Step 4: Simplify right side
    6,678.82x = 36,786,360.43
  5. Step 5: Solve for x
    x = 36,786,360.43/6,678.82
  6. Step 6: Final answer
    x = 5,507.91

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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.