Home / 20,080.46-27,711.10-11,128.11

Finding the Fourth Proportional to 20,080.46, 27,711.10 and 11,128.11

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Solution

The fourth proportional to 20,080.46, 27,711.10 and 11,128.11 is: 15,356.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.46 : 27,711.10 = 11,128.11 : x
  2. Step 2: Convert to fraction form
    20,080.46/27,711.10 = 11,128.11/x
  3. Step 3: Cross multiply
    20,080.46x = 27,711.10 × 11,128.11
  4. Step 4: Simplify right side
    20,080.46x = 308,372,169.02
  5. Step 5: Solve for x
    x = 308,372,169.02/20,080.46
  6. Step 6: Final answer
    x = 15,356.83

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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.