Home / 18,781.80-28,168.56-5,627.04

Finding the Fourth Proportional to 18,781.80, 28,168.56 and 5,627.04

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Solution

The fourth proportional to 18,781.80, 28,168.56 and 5,627.04 is: 8,439.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781.80 : 28,168.56 = 5,627.04 : x
  2. Step 2: Convert to fraction form
    18,781.80/28,168.56 = 5,627.04/x
  3. Step 3: Cross multiply
    18,781.80x = 28,168.56 × 5,627.04
  4. Step 4: Simplify right side
    18,781.80x = 158,505,613.86
  5. Step 5: Solve for x
    x = 158,505,613.86/18,781.80
  6. Step 6: Final answer
    x = 8,439.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.