Home / 20,909.26-31,355.79-7,758.64

Finding the Fourth Proportional to 20,909.26, 31,355.79 and 7,758.64

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Solution

The fourth proportional to 20,909.26, 31,355.79 and 7,758.64 is: 11,634.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.26 : 31,355.79 = 7,758.64 : x
  2. Step 2: Convert to fraction form
    20,909.26/31,355.79 = 7,758.64/x
  3. Step 3: Cross multiply
    20,909.26x = 31,355.79 × 7,758.64
  4. Step 4: Simplify right side
    20,909.26x = 243,278,286.53
  5. Step 5: Solve for x
    x = 243,278,286.53/20,909.26
  6. Step 6: Final answer
    x = 11,634.95

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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.