Home / 20,481.75-28,263.02-11,406.43

Finding the Fourth Proportional to 20,481.75, 28,263.02 and 11,406.43

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Solution

The fourth proportional to 20,481.75, 28,263.02 and 11,406.43 is: 15,739.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,481.75 : 28,263.02 = 11,406.43 : x
  2. Step 2: Convert to fraction form
    20,481.75/28,263.02 = 11,406.43/x
  3. Step 3: Cross multiply
    20,481.75x = 28,263.02 × 11,406.43
  4. Step 4: Simplify right side
    20,481.75x = 322,380,137.52
  5. Step 5: Solve for x
    x = 322,380,137.52/20,481.75
  6. Step 6: Final answer
    x = 15,739.87

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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.