Home / 20,287.78-27,998.43-11,336.50

Finding the Fourth Proportional to 20,287.78, 27,998.43 and 11,336.50

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Solution

The fourth proportional to 20,287.78, 27,998.43 and 11,336.50 is: 15,645.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,287.78 : 27,998.43 = 11,336.50 : x
  2. Step 2: Convert to fraction form
    20,287.78/27,998.43 = 11,336.50/x
  3. Step 3: Cross multiply
    20,287.78x = 27,998.43 × 11,336.50
  4. Step 4: Simplify right side
    20,287.78x = 317,404,201.70
  5. Step 5: Solve for x
    x = 317,404,201.70/20,287.78
  6. Step 6: Final answer
    x = 15,645.09

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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.