Home / 8,121.25-12,186.14-5,764.55

Finding the Fourth Proportional to 8,121.25, 12,186.14 and 5,764.55

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Solution

The fourth proportional to 8,121.25, 12,186.14 and 5,764.55 is: 8,649.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.25 : 12,186.14 = 5,764.55 : x
  2. Step 2: Convert to fraction form
    8,121.25/12,186.14 = 5,764.55/x
  3. Step 3: Cross multiply
    8,121.25x = 12,186.14 × 5,764.55
  4. Step 4: Simplify right side
    8,121.25x = 70,247,613.34
  5. Step 5: Solve for x
    x = 70,247,613.34/8,121.25
  6. Step 6: Final answer
    x = 8,649.86

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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.