Home / 20,189.78-27,863.20-11,237.25

Finding the Fourth Proportional to 20,189.78, 27,863.20 and 11,237.25

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Solution

The fourth proportional to 20,189.78, 27,863.20 and 11,237.25 is: 15,508.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,189.78 : 27,863.20 = 11,237.25 : x
  2. Step 2: Convert to fraction form
    20,189.78/27,863.20 = 11,237.25/x
  3. Step 3: Cross multiply
    20,189.78x = 27,863.20 × 11,237.25
  4. Step 4: Simplify right side
    20,189.78x = 313,105,744.20
  5. Step 5: Solve for x
    x = 313,105,744.20/20,189.78
  6. Step 6: Final answer
    x = 15,508.13

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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.