Home / 18,820.17-28,230.27-4,781.25

Finding the Fourth Proportional to 18,820.17, 28,230.27 and 4,781.25

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Solution

The fourth proportional to 18,820.17, 28,230.27 and 4,781.25 is: 7,171.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.17 : 28,230.27 = 4,781.25 : x
  2. Step 2: Convert to fraction form
    18,820.17/28,230.27 = 4,781.25/x
  3. Step 3: Cross multiply
    18,820.17x = 28,230.27 × 4,781.25
  4. Step 4: Simplify right side
    18,820.17x = 134,975,978.44
  5. Step 5: Solve for x
    x = 134,975,978.44/18,820.17
  6. Step 6: Final answer
    x = 7,171.88

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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.