Home / 20,299.11-27,982.97-13,128.48

Finding the Fourth Proportional to 20,299.11, 27,982.97 and 13,128.48

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Solution

The fourth proportional to 20,299.11, 27,982.97 and 13,128.48 is: 18,098.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,299.11 : 27,982.97 = 13,128.48 : x
  2. Step 2: Convert to fraction form
    20,299.11/27,982.97 = 13,128.48/x
  3. Step 3: Cross multiply
    20,299.11x = 27,982.97 × 13,128.48
  4. Step 4: Simplify right side
    20,299.11x = 367,373,845.58
  5. Step 5: Solve for x
    x = 367,373,845.58/20,299.11
  6. Step 6: Final answer
    x = 18,098.03

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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.