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Finding the Fourth Proportional to 6,609.71, 9,121.09 and 3,958.58

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Solution

The fourth proportional to 6,609.71, 9,121.09 and 3,958.58 is: 5,462.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,609.71 : 9,121.09 = 3,958.58 : x
  2. Step 2: Convert to fraction form
    6,609.71/9,121.09 = 3,958.58/x
  3. Step 3: Cross multiply
    6,609.71x = 9,121.09 × 3,958.58
  4. Step 4: Simplify right side
    6,609.71x = 36,106,508.95
  5. Step 5: Solve for x
    x = 36,106,508.95/6,609.71
  6. Step 6: Final answer
    x = 5,462.65

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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.