Home / 20,136.75-27,789.09-11,185.08

Finding the Fourth Proportional to 20,136.75, 27,789.09 and 11,185.08

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Solution

The fourth proportional to 20,136.75, 27,789.09 and 11,185.08 is: 15,435.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,136.75 : 27,789.09 = 11,185.08 : x
  2. Step 2: Convert to fraction form
    20,136.75/27,789.09 = 11,185.08/x
  3. Step 3: Cross multiply
    20,136.75x = 27,789.09 × 11,185.08
  4. Step 4: Simplify right side
    20,136.75x = 310,823,194.78
  5. Step 5: Solve for x
    x = 310,823,194.78/20,136.75
  6. Step 6: Final answer
    x = 15,435.62

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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.