Home / 20,080.54-27,712.73-11,128.90

Finding the Fourth Proportional to 20,080.54, 27,712.73 and 11,128.90

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Solution

The fourth proportional to 20,080.54, 27,712.73 and 11,128.90 is: 15,358.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.54 : 27,712.73 = 11,128.90 : x
  2. Step 2: Convert to fraction form
    20,080.54/27,712.73 = 11,128.90/x
  3. Step 3: Cross multiply
    20,080.54x = 27,712.73 × 11,128.90
  4. Step 4: Simplify right side
    20,080.54x = 308,412,200.90
  5. Step 5: Solve for x
    x = 308,412,200.90/20,080.54
  6. Step 6: Final answer
    x = 15,358.76

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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.