Home / 20,911.82-28,858.41-11,959.70

Finding the Fourth Proportional to 20,911.82, 28,858.41 and 11,959.70

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Solution

The fourth proportional to 20,911.82, 28,858.41 and 11,959.70 is: 16,504.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.82 : 28,858.41 = 11,959.70 : x
  2. Step 2: Convert to fraction form
    20,911.82/28,858.41 = 11,959.70/x
  3. Step 3: Cross multiply
    20,911.82x = 28,858.41 × 11,959.70
  4. Step 4: Simplify right side
    20,911.82x = 345,137,781.78
  5. Step 5: Solve for x
    x = 345,137,781.78/20,911.82
  6. Step 6: Final answer
    x = 16,504.44

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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.