Home / 20,743.91-28,629.38-13,190.99

Finding the Fourth Proportional to 20,743.91, 28,629.38 and 13,190.99

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Solution

The fourth proportional to 20,743.91, 28,629.38 and 13,190.99 is: 18,205.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.91 : 28,629.38 = 13,190.99 : x
  2. Step 2: Convert to fraction form
    20,743.91/28,629.38 = 13,190.99/x
  3. Step 3: Cross multiply
    20,743.91x = 28,629.38 × 13,190.99
  4. Step 4: Simplify right side
    20,743.91x = 377,649,865.29
  5. Step 5: Solve for x
    x = 377,649,865.29/20,743.91
  6. Step 6: Final answer
    x = 18,205.34

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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.