Home / 20,828.72-28,743.50-11,268.57

Finding the Fourth Proportional to 20,828.72, 28,743.50 and 11,268.57

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Solution

The fourth proportional to 20,828.72, 28,743.50 and 11,268.57 is: 15,550.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.72 : 28,743.50 = 11,268.57 : x
  2. Step 2: Convert to fraction form
    20,828.72/28,743.50 = 11,268.57/x
  3. Step 3: Cross multiply
    20,828.72x = 28,743.50 × 11,268.57
  4. Step 4: Simplify right side
    20,828.72x = 323,898,141.80
  5. Step 5: Solve for x
    x = 323,898,141.80/20,828.72
  6. Step 6: Final answer
    x = 15,550.56

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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.