Home / 20,239.12-27,930.14-11,287.20

Finding the Fourth Proportional to 20,239.12, 27,930.14 and 11,287.20

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Solution

The fourth proportional to 20,239.12, 27,930.14 and 11,287.20 is: 15,576.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,239.12 : 27,930.14 = 11,287.20 : x
  2. Step 2: Convert to fraction form
    20,239.12/27,930.14 = 11,287.20/x
  3. Step 3: Cross multiply
    20,239.12x = 27,930.14 × 11,287.20
  4. Step 4: Simplify right side
    20,239.12x = 315,253,076.21
  5. Step 5: Solve for x
    x = 315,253,076.21/20,239.12
  6. Step 6: Final answer
    x = 15,576.42

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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.