Home / 8,185.38-12,278.37-2,638.80

Finding the Fourth Proportional to 8,185.38, 12,278.37 and 2,638.80

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Solution

The fourth proportional to 8,185.38, 12,278.37 and 2,638.80 is: 3,958.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,185.38 : 12,278.37 = 2,638.80 : x
  2. Step 2: Convert to fraction form
    8,185.38/12,278.37 = 2,638.80/x
  3. Step 3: Cross multiply
    8,185.38x = 12,278.37 × 2,638.80
  4. Step 4: Simplify right side
    8,185.38x = 32,400,149.56
  5. Step 5: Solve for x
    x = 32,400,149.56/8,185.38
  6. Step 6: Final answer
    x = 3,958.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.