Home / 8,137.68-12,213.60-3,980.76

Finding the Fourth Proportional to 8,137.68, 12,213.60 and 3,980.76

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Solution

The fourth proportional to 8,137.68, 12,213.60 and 3,980.76 is: 5,974.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,137.68 : 12,213.60 = 3,980.76 : x
  2. Step 2: Convert to fraction form
    8,137.68/12,213.60 = 3,980.76/x
  3. Step 3: Cross multiply
    8,137.68x = 12,213.60 × 3,980.76
  4. Step 4: Simplify right side
    8,137.68x = 48,619,410.34
  5. Step 5: Solve for x
    x = 48,619,410.34/8,137.68
  6. Step 6: Final answer
    x = 5,974.60

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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.