Home / 8,121.12-12,182.16-2,574.36

Finding the Fourth Proportional to 8,121.12, 12,182.16 and 2,574.36

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Solution

The fourth proportional to 8,121.12, 12,182.16 and 2,574.36 is: 3,861.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.12 : 12,182.16 = 2,574.36 : x
  2. Step 2: Convert to fraction form
    8,121.12/12,182.16 = 2,574.36/x
  3. Step 3: Cross multiply
    8,121.12x = 12,182.16 × 2,574.36
  4. Step 4: Simplify right side
    8,121.12x = 31,361,265.42
  5. Step 5: Solve for x
    x = 31,361,265.42/8,121.12
  6. Step 6: Final answer
    x = 3,861.69

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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.