Home / 20,079.88-27,711.30-11,128.36

Finding the Fourth Proportional to 20,079.88, 27,711.30 and 11,128.36

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Solution

The fourth proportional to 20,079.88, 27,711.30 and 11,128.36 is: 15,357.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.88 : 27,711.30 = 11,128.36 : x
  2. Step 2: Convert to fraction form
    20,079.88/27,711.30 = 11,128.36/x
  3. Step 3: Cross multiply
    20,079.88x = 27,711.30 × 11,128.36
  4. Step 4: Simplify right side
    20,079.88x = 308,381,322.47
  5. Step 5: Solve for x
    x = 308,381,322.47/20,079.88
  6. Step 6: Final answer
    x = 15,357.73

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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.