Home / 20,305.22-28,021.55-11,351.75

Finding the Fourth Proportional to 20,305.22, 28,021.55 and 11,351.75

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Solution

The fourth proportional to 20,305.22, 28,021.55 and 11,351.75 is: 15,665.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,305.22 : 28,021.55 = 11,351.75 : x
  2. Step 2: Convert to fraction form
    20,305.22/28,021.55 = 11,351.75/x
  3. Step 3: Cross multiply
    20,305.22x = 28,021.55 × 11,351.75
  4. Step 4: Simplify right side
    20,305.22x = 318,093,433.35
  5. Step 5: Solve for x
    x = 318,093,433.35/20,305.22
  6. Step 6: Final answer
    x = 15,665.60

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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.