Home / 20,087.49-27,720.97-11,135.15

Finding the Fourth Proportional to 20,087.49, 27,720.97 and 11,135.15

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Solution

The fourth proportional to 20,087.49, 27,720.97 and 11,135.15 is: 15,366.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,087.49 : 27,720.97 = 11,135.15 : x
  2. Step 2: Convert to fraction form
    20,087.49/27,720.97 = 11,135.15/x
  3. Step 3: Cross multiply
    20,087.49x = 27,720.97 × 11,135.15
  4. Step 4: Simplify right side
    20,087.49x = 308,676,992.65
  5. Step 5: Solve for x
    x = 308,676,992.65/20,087.49
  6. Step 6: Final answer
    x = 15,366.63

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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.