Home / 18,938.20-28,383.30-7,235.80

Finding the Fourth Proportional to 18,938.20, 28,383.30 and 7,235.80

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Solution

The fourth proportional to 18,938.20, 28,383.30 and 7,235.80 is: 10,844.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,938.20 : 28,383.30 = 7,235.80 : x
  2. Step 2: Convert to fraction form
    18,938.20/28,383.30 = 7,235.80/x
  3. Step 3: Cross multiply
    18,938.20x = 28,383.30 × 7,235.80
  4. Step 4: Simplify right side
    18,938.20x = 205,375,882.14
  5. Step 5: Solve for x
    x = 205,375,882.14/18,938.20
  6. Step 6: Final answer
    x = 10,844.53

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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.