Home / 20,132.20-27,779.48-11,179.78

Finding the Fourth Proportional to 20,132.20, 27,779.48 and 11,179.78

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Solution

The fourth proportional to 20,132.20, 27,779.48 and 11,179.78 is: 15,426.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,132.20 : 27,779.48 = 11,179.78 : x
  2. Step 2: Convert to fraction form
    20,132.20/27,779.48 = 11,179.78/x
  3. Step 3: Cross multiply
    20,132.20x = 27,779.48 × 11,179.78
  4. Step 4: Simplify right side
    20,132.20x = 310,568,474.91
  5. Step 5: Solve for x
    x = 310,568,474.91/20,132.20
  6. Step 6: Final answer
    x = 15,426.45

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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.