Home / 7,181.89-9,891.18-6,186.80

Finding the Fourth Proportional to 7,181.89, 9,891.18 and 6,186.80

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Solution

The fourth proportional to 7,181.89, 9,891.18 and 6,186.80 is: 8,520.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,181.89 : 9,891.18 = 6,186.80 : x
  2. Step 2: Convert to fraction form
    7,181.89/9,891.18 = 6,186.80/x
  3. Step 3: Cross multiply
    7,181.89x = 9,891.18 × 6,186.80
  4. Step 4: Simplify right side
    7,181.89x = 61,194,777.15
  5. Step 5: Solve for x
    x = 61,194,777.15/7,181.89
  6. Step 6: Final answer
    x = 8,520.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.