Home / 6,438.96-9,670.32-3,979.80

Finding the Fourth Proportional to 6,438.96, 9,670.32 and 3,979.80

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Solution

The fourth proportional to 6,438.96, 9,670.32 and 3,979.80 is: 5,977.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,438.96 : 9,670.32 = 3,979.80 : x
  2. Step 2: Convert to fraction form
    6,438.96/9,670.32 = 3,979.80/x
  3. Step 3: Cross multiply
    6,438.96x = 9,670.32 × 3,979.80
  4. Step 4: Simplify right side
    6,438.96x = 38,485,939.54
  5. Step 5: Solve for x
    x = 38,485,939.54/6,438.96
  6. Step 6: Final answer
    x = 5,977.04

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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.