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Finding the Fourth Proportional to 6,399.12, 8,830.80 and 3,604.80

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Solution

The fourth proportional to 6,399.12, 8,830.80 and 3,604.80 is: 4,974.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,399.12 : 8,830.80 = 3,604.80 : x
  2. Step 2: Convert to fraction form
    6,399.12/8,830.80 = 3,604.80/x
  3. Step 3: Cross multiply
    6,399.12x = 8,830.80 × 3,604.80
  4. Step 4: Simplify right side
    6,399.12x = 31,833,267.84
  5. Step 5: Solve for x
    x = 31,833,267.84/6,399.12
  6. Step 6: Final answer
    x = 4,974.63

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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.