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Finding the Fourth Proportional to 6,379.80, 8,805.24 and 3,690.72

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Solution

The fourth proportional to 6,379.80, 8,805.24 and 3,690.72 is: 5,093.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,379.80 : 8,805.24 = 3,690.72 : x
  2. Step 2: Convert to fraction form
    6,379.80/8,805.24 = 3,690.72/x
  3. Step 3: Cross multiply
    6,379.80x = 8,805.24 × 3,690.72
  4. Step 4: Simplify right side
    6,379.80x = 32,497,675.37
  5. Step 5: Solve for x
    x = 32,497,675.37/6,379.80
  6. Step 6: Final answer
    x = 5,093.84

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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.