Home / 20,142.72-27,797.28-11,191.20

Finding the Fourth Proportional to 20,142.72, 27,797.28 and 11,191.20

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Solution

The fourth proportional to 20,142.72, 27,797.28 and 11,191.20 is: 15,444.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.72 : 27,797.28 = 11,191.20 : x
  2. Step 2: Convert to fraction form
    20,142.72/27,797.28 = 11,191.20/x
  3. Step 3: Cross multiply
    20,142.72x = 27,797.28 × 11,191.20
  4. Step 4: Simplify right side
    20,142.72x = 311,084,919.94
  5. Step 5: Solve for x
    x = 311,084,919.94/20,142.72
  6. Step 6: Final answer
    x = 15,444.04

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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.