Home / 7,885.20-11,827.80-3,997.20

Finding the Fourth Proportional to 7,885.20, 11,827.80 and 3,997.20

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Solution

The fourth proportional to 7,885.20, 11,827.80 and 3,997.20 is: 5,995.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,885.20 : 11,827.80 = 3,997.20 : x
  2. Step 2: Convert to fraction form
    7,885.20/11,827.80 = 3,997.20/x
  3. Step 3: Cross multiply
    7,885.20x = 11,827.80 × 3,997.20
  4. Step 4: Simplify right side
    7,885.20x = 47,278,082.16
  5. Step 5: Solve for x
    x = 47,278,082.16/7,885.20
  6. Step 6: Final answer
    x = 5,995.80

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Similar ratio
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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.