Home / 20,911.91-28,858.48-11,481.08

Finding the Fourth Proportional to 20,911.91, 28,858.48 and 11,481.08

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Solution

The fourth proportional to 20,911.91, 28,858.48 and 11,481.08 is: 15,843.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.91 : 28,858.48 = 11,481.08 : x
  2. Step 2: Convert to fraction form
    20,911.91/28,858.48 = 11,481.08/x
  3. Step 3: Cross multiply
    20,911.91x = 28,858.48 × 11,481.08
  4. Step 4: Simplify right side
    20,911.91x = 331,326,344.56
  5. Step 5: Solve for x
    x = 331,326,344.56/20,911.91
  6. Step 6: Final answer
    x = 15,843.91

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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.