Home / 20,239.30-27,930.39-11,287.38

Finding the Fourth Proportional to 20,239.30, 27,930.39 and 11,287.38

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Solution

The fourth proportional to 20,239.30, 27,930.39 and 11,287.38 is: 15,576.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,239.30 : 27,930.39 = 11,287.38 : x
  2. Step 2: Convert to fraction form
    20,239.30/27,930.39 = 11,287.38/x
  3. Step 3: Cross multiply
    20,239.30x = 27,930.39 × 11,287.38
  4. Step 4: Simplify right side
    20,239.30x = 315,260,987.89
  5. Step 5: Solve for x
    x = 315,260,987.89/20,239.30
  6. Step 6: Final answer
    x = 15,576.67

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Half scale
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Double scale
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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.