Home / 20,239.90-27,931.56-11,287.33

Finding the Fourth Proportional to 20,239.90, 27,931.56 and 11,287.33

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Solution

The fourth proportional to 20,239.90, 27,931.56 and 11,287.33 is: 15,576.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,239.90 : 27,931.56 = 11,287.33 : x
  2. Step 2: Convert to fraction form
    20,239.90/27,931.56 = 11,287.33/x
  3. Step 3: Cross multiply
    20,239.90x = 27,931.56 × 11,287.33
  4. Step 4: Simplify right side
    20,239.90x = 315,272,735.13
  5. Step 5: Solve for x
    x = 315,272,735.13/20,239.90
  6. Step 6: Final answer
    x = 15,576.79

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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.