Home / 20,120.05-27,761.56-11,165.66

Finding the Fourth Proportional to 20,120.05, 27,761.56 and 11,165.66

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Solution

The fourth proportional to 20,120.05, 27,761.56 and 11,165.66 is: 15,406.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.05 : 27,761.56 = 11,165.66 : x
  2. Step 2: Convert to fraction form
    20,120.05/27,761.56 = 11,165.66/x
  3. Step 3: Cross multiply
    20,120.05x = 27,761.56 × 11,165.66
  4. Step 4: Simplify right side
    20,120.05x = 309,976,077.41
  5. Step 5: Solve for x
    x = 309,976,077.41/20,120.05
  6. Step 6: Final answer
    x = 15,406.33

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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.