Home / 20,080.96-27,711.79-11,128.61

Finding the Fourth Proportional to 20,080.96, 27,711.79 and 11,128.61

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Solution

The fourth proportional to 20,080.96, 27,711.79 and 11,128.61 is: 15,357.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.96 : 27,711.79 = 11,128.61 : x
  2. Step 2: Convert to fraction form
    20,080.96/27,711.79 = 11,128.61/x
  3. Step 3: Cross multiply
    20,080.96x = 27,711.79 × 11,128.61
  4. Step 4: Simplify right side
    20,080.96x = 308,393,703.31
  5. Step 5: Solve for x
    x = 308,393,703.31/20,080.96
  6. Step 6: Final answer
    x = 15,357.52

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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.