Home / 6,467.13-8,919.23-3,978.81

Finding the Fourth Proportional to 6,467.13, 8,919.23 and 3,978.81

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Solution

The fourth proportional to 6,467.13, 8,919.23 and 3,978.81 is: 5,487.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,467.13 : 8,919.23 = 3,978.81 : x
  2. Step 2: Convert to fraction form
    6,467.13/8,919.23 = 3,978.81/x
  3. Step 3: Cross multiply
    6,467.13x = 8,919.23 × 3,978.81
  4. Step 4: Simplify right side
    6,467.13x = 35,487,901.62
  5. Step 5: Solve for x
    x = 35,487,901.62/6,467.13
  6. Step 6: Final answer
    x = 5,487.43

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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.