Home / 20,682.75-28,542.08-11,251.31

Finding the Fourth Proportional to 20,682.75, 28,542.08 and 11,251.31

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Solution

The fourth proportional to 20,682.75, 28,542.08 and 11,251.31 is: 15,526.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,682.75 : 28,542.08 = 11,251.31 : x
  2. Step 2: Convert to fraction form
    20,682.75/28,542.08 = 11,251.31/x
  3. Step 3: Cross multiply
    20,682.75x = 28,542.08 × 11,251.31
  4. Step 4: Simplify right side
    20,682.75x = 321,135,790.12
  5. Step 5: Solve for x
    x = 321,135,790.12/20,682.75
  6. Step 6: Final answer
    x = 15,526.75

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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.