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Finding the Fourth Proportional to 6,392.14, 8,821.20 and 3,559.44

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Solution

The fourth proportional to 6,392.14, 8,821.20 and 3,559.44 is: 4,912.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,392.14 : 8,821.20 = 3,559.44 : x
  2. Step 2: Convert to fraction form
    6,392.14/8,821.20 = 3,559.44/x
  3. Step 3: Cross multiply
    6,392.14x = 8,821.20 × 3,559.44
  4. Step 4: Simplify right side
    6,392.14x = 31,398,532.13
  5. Step 5: Solve for x
    x = 31,398,532.13/6,392.14
  6. Step 6: Final answer
    x = 4,912.05

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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.