Home / 6,643.21-9,167.65-3,990.66

Finding the Fourth Proportional to 6,643.21, 9,167.65 and 3,990.66

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Solution

The fourth proportional to 6,643.21, 9,167.65 and 3,990.66 is: 5,507.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,643.21 : 9,167.65 = 3,990.66 : x
  2. Step 2: Convert to fraction form
    6,643.21/9,167.65 = 3,990.66/x
  3. Step 3: Cross multiply
    6,643.21x = 9,167.65 × 3,990.66
  4. Step 4: Simplify right side
    6,643.21x = 36,584,974.15
  5. Step 5: Solve for x
    x = 36,584,974.15/6,643.21
  6. Step 6: Final answer
    x = 5,507.12

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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.