Home / 20,086.39-27,720.87-11,136.70

Finding the Fourth Proportional to 20,086.39, 27,720.87 and 11,136.70

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Solution

The fourth proportional to 20,086.39, 27,720.87 and 11,136.70 is: 15,369.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,086.39 : 27,720.87 = 11,136.70 : x
  2. Step 2: Convert to fraction form
    20,086.39/27,720.87 = 11,136.70/x
  3. Step 3: Cross multiply
    20,086.39x = 27,720.87 × 11,136.70
  4. Step 4: Simplify right side
    20,086.39x = 308,719,012.93
  5. Step 5: Solve for x
    x = 308,719,012.93/20,086.39
  6. Step 6: Final answer
    x = 15,369.56

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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.