Home / 20,105.20-27,772.23-15,447.70

Finding the Fourth Proportional to 20,105.20, 27,772.23 and 15,447.70

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Solution

The fourth proportional to 20,105.20, 27,772.23 and 15,447.70 is: 21,338.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.20 : 27,772.23 = 15,447.70 : x
  2. Step 2: Convert to fraction form
    20,105.20/27,772.23 = 15,447.70/x
  3. Step 3: Cross multiply
    20,105.20x = 27,772.23 × 15,447.70
  4. Step 4: Simplify right side
    20,105.20x = 429,017,077.37
  5. Step 5: Solve for x
    x = 429,017,077.37/20,105.20
  6. Step 6: Final answer
    x = 21,338.61

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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.