Home / 20,131.48-27,781.74-12,172.30

Finding the Fourth Proportional to 20,131.48, 27,781.74 and 12,172.30

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Solution

The fourth proportional to 20,131.48, 27,781.74 and 12,172.30 is: 16,797.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.48 : 27,781.74 = 12,172.30 : x
  2. Step 2: Convert to fraction form
    20,131.48/27,781.74 = 12,172.30/x
  3. Step 3: Cross multiply
    20,131.48x = 27,781.74 × 12,172.30
  4. Step 4: Simplify right side
    20,131.48x = 338,167,673.80
  5. Step 5: Solve for x
    x = 338,167,673.80/20,131.48
  6. Step 6: Final answer
    x = 16,797.95

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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.