Home / 20,115.27-27,760.68-11,164.50

Finding the Fourth Proportional to 20,115.27, 27,760.68 and 11,164.50

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Solution

The fourth proportional to 20,115.27, 27,760.68 and 11,164.50 is: 15,407.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.27 : 27,760.68 = 11,164.50 : x
  2. Step 2: Convert to fraction form
    20,115.27/27,760.68 = 11,164.50/x
  3. Step 3: Cross multiply
    20,115.27x = 27,760.68 × 11,164.50
  4. Step 4: Simplify right side
    20,115.27x = 309,934,111.86
  5. Step 5: Solve for x
    x = 309,934,111.86/20,115.27
  6. Step 6: Final answer
    x = 15,407.90

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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.