Home / 20,115.23-27,759.32-11,163.31

Finding the Fourth Proportional to 20,115.23, 27,759.32 and 11,163.31

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Solution

The fourth proportional to 20,115.23, 27,759.32 and 11,163.31 is: 15,405.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.23 : 27,759.32 = 11,163.31 : x
  2. Step 2: Convert to fraction form
    20,115.23/27,759.32 = 11,163.31/x
  3. Step 3: Cross multiply
    20,115.23x = 27,759.32 × 11,163.31
  4. Step 4: Simplify right side
    20,115.23x = 309,885,894.55
  5. Step 5: Solve for x
    x = 309,885,894.55/20,115.23
  6. Step 6: Final answer
    x = 15,405.54

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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.