Home / 20,789.97-28,690.16-11,229.87

Finding the Fourth Proportional to 20,789.97, 28,690.16 and 11,229.87

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Solution

The fourth proportional to 20,789.97, 28,690.16 and 11,229.87 is: 15,497.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.97 : 28,690.16 = 11,229.87 : x
  2. Step 2: Convert to fraction form
    20,789.97/28,690.16 = 11,229.87/x
  3. Step 3: Cross multiply
    20,789.97x = 28,690.16 × 11,229.87
  4. Step 4: Simplify right side
    20,789.97x = 322,186,767.08
  5. Step 5: Solve for x
    x = 322,186,767.08/20,789.97
  6. Step 6: Final answer
    x = 15,497.22

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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.