Home / 20,739.44-28,619.20-11,785.70

Finding the Fourth Proportional to 20,739.44, 28,619.20 and 11,785.70

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Solution

The fourth proportional to 20,739.44, 28,619.20 and 11,785.70 is: 16,263.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.44 : 28,619.20 = 11,785.70 : x
  2. Step 2: Convert to fraction form
    20,739.44/28,619.20 = 11,785.70/x
  3. Step 3: Cross multiply
    20,739.44x = 28,619.20 × 11,785.70
  4. Step 4: Simplify right side
    20,739.44x = 337,297,305.44
  5. Step 5: Solve for x
    x = 337,297,305.44/20,739.44
  6. Step 6: Final answer
    x = 16,263.57

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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.