Home / 20,168.28-27,832.62-11,215.80

Finding the Fourth Proportional to 20,168.28, 27,832.62 and 11,215.80

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Solution

The fourth proportional to 20,168.28, 27,832.62 and 11,215.80 is: 15,478.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,168.28 : 27,832.62 = 11,215.80 : x
  2. Step 2: Convert to fraction form
    20,168.28/27,832.62 = 11,215.80/x
  3. Step 3: Cross multiply
    20,168.28x = 27,832.62 × 11,215.80
  4. Step 4: Simplify right side
    20,168.28x = 312,165,099.40
  5. Step 5: Solve for x
    x = 312,165,099.40/20,168.28
  6. Step 6: Final answer
    x = 15,478.02

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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.