Home / 20,728.19-28,604.85-11,296.73

Finding the Fourth Proportional to 20,728.19, 28,604.85 and 11,296.73

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Solution

The fourth proportional to 20,728.19, 28,604.85 and 11,296.73 is: 15,589.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.19 : 28,604.85 = 11,296.73 : x
  2. Step 2: Convert to fraction form
    20,728.19/28,604.85 = 11,296.73/x
  3. Step 3: Cross multiply
    20,728.19x = 28,604.85 × 11,296.73
  4. Step 4: Simplify right side
    20,728.19x = 323,141,267.14
  5. Step 5: Solve for x
    x = 323,141,267.14/20,728.19
  6. Step 6: Final answer
    x = 15,589.46

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Half scale
Find fourth proportional to 41,456.38, 57,209.70 and 22,593.46
Double scale
Find fourth proportional to 20,729.19, 28,606.23 and 11,297.73
Similar ratio
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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.