Home / 20,080.55-27,711.33-11,128.21

Finding the Fourth Proportional to 20,080.55, 27,711.33 and 11,128.21

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Solution

The fourth proportional to 20,080.55, 27,711.33 and 11,128.21 is: 15,357.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.55 : 27,711.33 = 11,128.21 : x
  2. Step 2: Convert to fraction form
    20,080.55/27,711.33 = 11,128.21/x
  3. Step 3: Cross multiply
    20,080.55x = 27,711.33 × 11,128.21
  4. Step 4: Simplify right side
    20,080.55x = 308,377,499.62
  5. Step 5: Solve for x
    x = 308,377,499.62/20,080.55
  6. Step 6: Final answer
    x = 15,357.02

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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.