Home / 20,951.22-28,911.94-11,519.71

Finding the Fourth Proportional to 20,951.22, 28,911.94 and 11,519.71

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Solution

The fourth proportional to 20,951.22, 28,911.94 and 11,519.71 is: 15,896.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,951.22 : 28,911.94 = 11,519.71 : x
  2. Step 2: Convert to fraction form
    20,951.22/28,911.94 = 11,519.71/x
  3. Step 3: Cross multiply
    20,951.22x = 28,911.94 × 11,519.71
  4. Step 4: Simplify right side
    20,951.22x = 333,057,164.34
  5. Step 5: Solve for x
    x = 333,057,164.34/20,951.22
  6. Step 6: Final answer
    x = 15,896.79

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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.