Home / 20,728.18-28,604.91-11,296.75

Finding the Fourth Proportional to 20,728.18, 28,604.91 and 11,296.75

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Solution

The fourth proportional to 20,728.18, 28,604.91 and 11,296.75 is: 15,589.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.18 : 28,604.91 = 11,296.75 : x
  2. Step 2: Convert to fraction form
    20,728.18/28,604.91 = 11,296.75/x
  3. Step 3: Cross multiply
    20,728.18x = 28,604.91 × 11,296.75
  4. Step 4: Simplify right side
    20,728.18x = 323,142,517.04
  5. Step 5: Solve for x
    x = 323,142,517.04/20,728.18
  6. Step 6: Final answer
    x = 15,589.53

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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.