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Finding the Fourth Proportional to 20,080.46, 27,711.02 and 11,128.52

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Solution

The fourth proportional to 20,080.46, 27,711.02 and 11,128.52 is: 15,357.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.46 : 27,711.02 = 11,128.52 : x
  2. Step 2: Convert to fraction form
    20,080.46/27,711.02 = 11,128.52/x
  3. Step 3: Cross multiply
    20,080.46x = 27,711.02 × 11,128.52
  4. Step 4: Simplify right side
    20,080.46x = 308,382,584.65
  5. Step 5: Solve for x
    x = 308,382,584.65/20,080.46
  6. Step 6: Final answer
    x = 15,357.35

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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.