Home / 20,137.50-27,789.95-11,185.99

Finding the Fourth Proportional to 20,137.50, 27,789.95 and 11,185.99

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Solution

The fourth proportional to 20,137.50, 27,789.95 and 11,185.99 is: 15,436.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,137.50 : 27,789.95 = 11,185.99 : x
  2. Step 2: Convert to fraction form
    20,137.50/27,789.95 = 11,185.99/x
  3. Step 3: Cross multiply
    20,137.50x = 27,789.95 × 11,185.99
  4. Step 4: Simplify right side
    20,137.50x = 310,858,102.80
  5. Step 5: Solve for x
    x = 310,858,102.80/20,137.50
  6. Step 6: Final answer
    x = 15,436.78

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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.