Home / 20,221.63-27,906.05-11,147.31

Finding the Fourth Proportional to 20,221.63, 27,906.05 and 11,147.31

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Solution

The fourth proportional to 20,221.63, 27,906.05 and 11,147.31 is: 15,383.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.63 : 27,906.05 = 11,147.31 : x
  2. Step 2: Convert to fraction form
    20,221.63/27,906.05 = 11,147.31/x
  3. Step 3: Cross multiply
    20,221.63x = 27,906.05 × 11,147.31
  4. Step 4: Simplify right side
    20,221.63x = 311,077,390.23
  5. Step 5: Solve for x
    x = 311,077,390.23/20,221.63
  6. Step 6: Final answer
    x = 15,383.40

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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.