Home / 20,711.12-28,589.68-12,326

Finding the Fourth Proportional to 20,711.12, 28,589.68 and 12,326

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Solution

The fourth proportional to 20,711.12, 28,589.68 and 12,326 is: 17,014.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.12 : 28,589.68 = 12,326 : x
  2. Step 2: Convert to fraction form
    20,711.12/28,589.68 = 12,326/x
  3. Step 3: Cross multiply
    20,711.12x = 28,589.68 × 12,326
  4. Step 4: Simplify right side
    20,711.12x = 352,396,395.68
  5. Step 5: Solve for x
    x = 352,396,395.68/20,711.12
  6. Step 6: Final answer
    x = 17,014.84

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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.