Home / 20,115.05-27,759.07-11,163.13

Finding the Fourth Proportional to 20,115.05, 27,759.07 and 11,163.13

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Solution

The fourth proportional to 20,115.05, 27,759.07 and 11,163.13 is: 15,405.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.05 : 27,759.07 = 11,163.13 : x
  2. Step 2: Convert to fraction form
    20,115.05/27,759.07 = 11,163.13/x
  3. Step 3: Cross multiply
    20,115.05x = 27,759.07 × 11,163.13
  4. Step 4: Simplify right side
    20,115.05x = 309,878,079.18
  5. Step 5: Solve for x
    x = 309,878,079.18/20,115.05
  6. Step 6: Final answer
    x = 15,405.29

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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.