Home / 6,429.80-9,642.96-2,212.64

Finding the Fourth Proportional to 6,429.80, 9,642.96 and 2,212.64

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Solution

The fourth proportional to 6,429.80, 9,642.96 and 2,212.64 is: 3,318.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,429.80 : 9,642.96 = 2,212.64 : x
  2. Step 2: Convert to fraction form
    6,429.80/9,642.96 = 2,212.64/x
  3. Step 3: Cross multiply
    6,429.80x = 9,642.96 × 2,212.64
  4. Step 4: Simplify right side
    6,429.80x = 21,336,399.01
  5. Step 5: Solve for x
    x = 21,336,399.01/6,429.80
  6. Step 6: Final answer
    x = 3,318.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.