Home / 20,131.93-27,781.13-11,180.00

Finding the Fourth Proportional to 20,131.93, 27,781.13 and 11,180.00

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Solution

The fourth proportional to 20,131.93, 27,781.13 and 11,180.00 is: 15,427.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.93 : 27,781.13 = 11,180.00 : x
  2. Step 2: Convert to fraction form
    20,131.93/27,781.13 = 11,180.00/x
  3. Step 3: Cross multiply
    20,131.93x = 27,781.13 × 11,180.00
  4. Step 4: Simplify right side
    20,131.93x = 310,593,130.80
  5. Step 5: Solve for x
    x = 310,593,130.80/20,131.93
  6. Step 6: Final answer
    x = 15,427.89

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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.