Home / 20,379.97-28,123.99-11,427.44

Finding the Fourth Proportional to 20,379.97, 28,123.99 and 11,427.44

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Solution

The fourth proportional to 20,379.97, 28,123.99 and 11,427.44 is: 15,769.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.97 : 28,123.99 = 11,427.44 : x
  2. Step 2: Convert to fraction form
    20,379.97/28,123.99 = 11,427.44/x
  3. Step 3: Cross multiply
    20,379.97x = 28,123.99 × 11,427.44
  4. Step 4: Simplify right side
    20,379.97x = 321,385,208.29
  5. Step 5: Solve for x
    x = 321,385,208.29/20,379.97
  6. Step 6: Final answer
    x = 15,769.66

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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.