Home / 20,189.28-27,845.40-13,118

Finding the Fourth Proportional to 20,189.28, 27,845.40 and 13,118

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Solution

The fourth proportional to 20,189.28, 27,845.40 and 13,118 is: 18,092.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,189.28 : 27,845.40 = 13,118 : x
  2. Step 2: Convert to fraction form
    20,189.28/27,845.40 = 13,118/x
  3. Step 3: Cross multiply
    20,189.28x = 27,845.40 × 13,118
  4. Step 4: Simplify right side
    20,189.28x = 365,275,957.20
  5. Step 5: Solve for x
    x = 365,275,957.20/20,189.28
  6. Step 6: Final answer
    x = 18,092.57

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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.