Home / 20,728.66-28,604.61-11,296.90

Finding the Fourth Proportional to 20,728.66, 28,604.61 and 11,296.90

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Solution

The fourth proportional to 20,728.66, 28,604.61 and 11,296.90 is: 15,589.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.66 : 28,604.61 = 11,296.90 : x
  2. Step 2: Convert to fraction form
    20,728.66/28,604.61 = 11,296.90/x
  3. Step 3: Cross multiply
    20,728.66x = 28,604.61 × 11,296.90
  4. Step 4: Simplify right side
    20,728.66x = 323,143,418.71
  5. Step 5: Solve for x
    x = 323,143,418.71/20,728.66
  6. Step 6: Final answer
    x = 15,589.21

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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.