Home / 20,131.21-27,781.41-11,747.71

Finding the Fourth Proportional to 20,131.21, 27,781.41 and 11,747.71

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Solution

The fourth proportional to 20,131.21, 27,781.41 and 11,747.71 is: 16,212.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.21 : 27,781.41 = 11,747.71 : x
  2. Step 2: Convert to fraction form
    20,131.21/27,781.41 = 11,747.71/x
  3. Step 3: Cross multiply
    20,131.21x = 27,781.41 × 11,747.71
  4. Step 4: Simplify right side
    20,131.21x = 326,367,948.07
  5. Step 5: Solve for x
    x = 326,367,948.07/20,131.21
  6. Step 6: Final answer
    x = 16,212.04

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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.