Home / 20,161.72-27,821.59-11,208.68

Finding the Fourth Proportional to 20,161.72, 27,821.59 and 11,208.68

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Solution

The fourth proportional to 20,161.72, 27,821.59 and 11,208.68 is: 15,467.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,161.72 : 27,821.59 = 11,208.68 : x
  2. Step 2: Convert to fraction form
    20,161.72/27,821.59 = 11,208.68/x
  3. Step 3: Cross multiply
    20,161.72x = 27,821.59 × 11,208.68
  4. Step 4: Simplify right side
    20,161.72x = 311,843,132.27
  5. Step 5: Solve for x
    x = 311,843,132.27/20,161.72
  6. Step 6: Final answer
    x = 15,467.09

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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.