Home / 8,185.26-12,255.66-6,420.90

Finding the Fourth Proportional to 8,185.26, 12,255.66 and 6,420.90

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Solution

The fourth proportional to 8,185.26, 12,255.66 and 6,420.90 is: 9,613.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,185.26 : 12,255.66 = 6,420.90 : x
  2. Step 2: Convert to fraction form
    8,185.26/12,255.66 = 6,420.90/x
  3. Step 3: Cross multiply
    8,185.26x = 12,255.66 × 6,420.90
  4. Step 4: Simplify right side
    8,185.26x = 78,692,367.29
  5. Step 5: Solve for x
    x = 78,692,367.29/8,185.26
  6. Step 6: Final answer
    x = 9,613.91

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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.