Home / 20,629.11-28,468.77-12,131.82

Finding the Fourth Proportional to 20,629.11, 28,468.77 and 12,131.82

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Solution

The fourth proportional to 20,629.11, 28,468.77 and 12,131.82 is: 16,742.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,629.11 : 28,468.77 = 12,131.82 : x
  2. Step 2: Convert to fraction form
    20,629.11/28,468.77 = 12,131.82/x
  3. Step 3: Cross multiply
    20,629.11x = 28,468.77 × 12,131.82
  4. Step 4: Simplify right side
    20,629.11x = 345,377,993.26
  5. Step 5: Solve for x
    x = 345,377,993.26/20,629.11
  6. Step 6: Final answer
    x = 16,742.26

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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.