Home / 20,088.36-27,720.94-11,135.80

Finding the Fourth Proportional to 20,088.36, 27,720.94 and 11,135.80

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Solution

The fourth proportional to 20,088.36, 27,720.94 and 11,135.80 is: 15,366.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,088.36 : 27,720.94 = 11,135.80 : x
  2. Step 2: Convert to fraction form
    20,088.36/27,720.94 = 11,135.80/x
  3. Step 3: Cross multiply
    20,088.36x = 27,720.94 × 11,135.80
  4. Step 4: Simplify right side
    20,088.36x = 308,694,843.65
  5. Step 5: Solve for x
    x = 308,694,843.65/20,088.36
  6. Step 6: Final answer
    x = 15,366.85

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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.