Home / 20,872.97-28,804.79-11,441.69

Finding the Fourth Proportional to 20,872.97, 28,804.79 and 11,441.69

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Solution

The fourth proportional to 20,872.97, 28,804.79 and 11,441.69 is: 15,789.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.97 : 28,804.79 = 11,441.69 : x
  2. Step 2: Convert to fraction form
    20,872.97/28,804.79 = 11,441.69/x
  3. Step 3: Cross multiply
    20,872.97x = 28,804.79 × 11,441.69
  4. Step 4: Simplify right side
    20,872.97x = 329,575,477.70
  5. Step 5: Solve for x
    x = 329,575,477.70/20,872.97
  6. Step 6: Final answer
    x = 15,789.58

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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.