Home / 20,684.92-28,543.44-11,729.56

Finding the Fourth Proportional to 20,684.92, 28,543.44 and 11,729.56

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Solution

The fourth proportional to 20,684.92, 28,543.44 and 11,729.56 is: 16,185.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,684.92 : 28,543.44 = 11,729.56 : x
  2. Step 2: Convert to fraction form
    20,684.92/28,543.44 = 11,729.56/x
  3. Step 3: Cross multiply
    20,684.92x = 28,543.44 × 11,729.56
  4. Step 4: Simplify right side
    20,684.92x = 334,801,992.09
  5. Step 5: Solve for x
    x = 334,801,992.09/20,684.92
  6. Step 6: Final answer
    x = 16,185.80

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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.