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Finding the Fourth Proportional to 6,247.90, 8,620.84 and 3,729.20

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Solution

The fourth proportional to 6,247.90, 8,620.84 and 3,729.20 is: 5,145.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,247.90 : 8,620.84 = 3,729.20 : x
  2. Step 2: Convert to fraction form
    6,247.90/8,620.84 = 3,729.20/x
  3. Step 3: Cross multiply
    6,247.90x = 8,620.84 × 3,729.20
  4. Step 4: Simplify right side
    6,247.90x = 32,148,836.53
  5. Step 5: Solve for x
    x = 32,148,836.53/6,247.90
  6. Step 6: Final answer
    x = 5,145.54

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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.