Home / 20,131.50-27,781.47-11,180.46

Finding the Fourth Proportional to 20,131.50, 27,781.47 and 11,180.46

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Solution

The fourth proportional to 20,131.50, 27,781.47 and 11,180.46 is: 15,429.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.50 : 27,781.47 = 11,180.46 : x
  2. Step 2: Convert to fraction form
    20,131.50/27,781.47 = 11,180.46/x
  3. Step 3: Cross multiply
    20,131.50x = 27,781.47 × 11,180.46
  4. Step 4: Simplify right side
    20,131.50x = 310,609,614.08
  5. Step 5: Solve for x
    x = 310,609,614.08/20,131.50
  6. Step 6: Final answer
    x = 15,429.03

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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.