Home / 20,161.78-27,822.69-11,208.66

Finding the Fourth Proportional to 20,161.78, 27,822.69 and 11,208.66

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Solution

The fourth proportional to 20,161.78, 27,822.69 and 11,208.66 is: 15,467.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,161.78 : 27,822.69 = 11,208.66 : x
  2. Step 2: Convert to fraction form
    20,161.78/27,822.69 = 11,208.66/x
  3. Step 3: Cross multiply
    20,161.78x = 27,822.69 × 11,208.66
  4. Step 4: Simplify right side
    20,161.78x = 311,855,072.50
  5. Step 5: Solve for x
    x = 311,855,072.50/20,161.78
  6. Step 6: Final answer
    x = 15,467.64

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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.