Home / 20,738.20-28,610.55-12,766.57

Finding the Fourth Proportional to 20,738.20, 28,610.55 and 12,766.57

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Solution

The fourth proportional to 20,738.20, 28,610.55 and 12,766.57 is: 17,612.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.20 : 28,610.55 = 12,766.57 : x
  2. Step 2: Convert to fraction form
    20,738.20/28,610.55 = 12,766.57/x
  3. Step 3: Cross multiply
    20,738.20x = 28,610.55 × 12,766.57
  4. Step 4: Simplify right side
    20,738.20x = 365,258,589.31
  5. Step 5: Solve for x
    x = 365,258,589.31/20,738.20
  6. Step 6: Final answer
    x = 17,612.84

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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.