Home / 20,357.92-28,093.44-11,405.80

Finding the Fourth Proportional to 20,357.92, 28,093.44 and 11,405.80

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Solution

The fourth proportional to 20,357.92, 28,093.44 and 11,405.80 is: 15,739.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,357.92 : 28,093.44 = 11,405.80 : x
  2. Step 2: Convert to fraction form
    20,357.92/28,093.44 = 11,405.80/x
  3. Step 3: Cross multiply
    20,357.92x = 28,093.44 × 11,405.80
  4. Step 4: Simplify right side
    20,357.92x = 320,428,157.95
  5. Step 5: Solve for x
    x = 320,428,157.95/20,357.92
  6. Step 6: Final answer
    x = 15,739.73

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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.