Home / 20,879.28-28,813.68-11,447.64

Finding the Fourth Proportional to 20,879.28, 28,813.68 and 11,447.64

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Solution

The fourth proportional to 20,879.28, 28,813.68 and 11,447.64 is: 15,797.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.28 : 28,813.68 = 11,447.64 : x
  2. Step 2: Convert to fraction form
    20,879.28/28,813.68 = 11,447.64/x
  3. Step 3: Cross multiply
    20,879.28x = 28,813.68 × 11,447.64
  4. Step 4: Simplify right side
    20,879.28x = 329,848,635.72
  5. Step 5: Solve for x
    x = 329,848,635.72/20,879.28
  6. Step 6: Final answer
    x = 15,797.89

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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.