Home / 5,518.80-7,615.20-3,279.86

Finding the Fourth Proportional to 5,518.80, 7,615.20 and 3,279.86

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Solution

The fourth proportional to 5,518.80, 7,615.20 and 3,279.86 is: 4,525.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,518.80 : 7,615.20 = 3,279.86 : x
  2. Step 2: Convert to fraction form
    5,518.80/7,615.20 = 3,279.86/x
  3. Step 3: Cross multiply
    5,518.80x = 7,615.20 × 3,279.86
  4. Step 4: Simplify right side
    5,518.80x = 24,976,789.87
  5. Step 5: Solve for x
    x = 24,976,789.87/5,518.80
  6. Step 6: Final answer
    x = 4,525.76

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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.