Home / 8,120.21-12,181.82-2,574.95

Finding the Fourth Proportional to 8,120.21, 12,181.82 and 2,574.95

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Solution

The fourth proportional to 8,120.21, 12,181.82 and 2,574.95 is: 3,862.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.21 : 12,181.82 = 2,574.95 : x
  2. Step 2: Convert to fraction form
    8,120.21/12,181.82 = 2,574.95/x
  3. Step 3: Cross multiply
    8,120.21x = 12,181.82 × 2,574.95
  4. Step 4: Simplify right side
    8,120.21x = 31,367,577.41
  5. Step 5: Solve for x
    x = 31,367,577.41/8,120.21
  6. Step 6: Final answer
    x = 3,862.90

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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.