Home / 20,080.70-27,711.56-11,128.31

Finding the Fourth Proportional to 20,080.70, 27,711.56 and 11,128.31

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Solution

The fourth proportional to 20,080.70, 27,711.56 and 11,128.31 is: 15,357.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.70 : 27,711.56 = 11,128.31 : x
  2. Step 2: Convert to fraction form
    20,080.70/27,711.56 = 11,128.31/x
  3. Step 3: Cross multiply
    20,080.70x = 27,711.56 × 11,128.31
  4. Step 4: Simplify right side
    20,080.70x = 308,382,830.26
  5. Step 5: Solve for x
    x = 308,382,830.26/20,080.70
  6. Step 6: Final answer
    x = 15,357.18

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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.