Home / 20,080.62-27,711.25-11,128.10

Finding the Fourth Proportional to 20,080.62, 27,711.25 and 11,128.10

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Solution

The fourth proportional to 20,080.62, 27,711.25 and 11,128.10 is: 15,356.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.62 : 27,711.25 = 11,128.10 : x
  2. Step 2: Convert to fraction form
    20,080.62/27,711.25 = 11,128.10/x
  3. Step 3: Cross multiply
    20,080.62x = 27,711.25 × 11,128.10
  4. Step 4: Simplify right side
    20,080.62x = 308,373,394.75
  5. Step 5: Solve for x
    x = 308,373,394.75/20,080.62
  6. Step 6: Final answer
    x = 15,356.77

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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.