Home / 5,478-8,221.48-3,837.84

Finding the Fourth Proportional to 5,478, 8,221.48 and 3,837.84

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Solution

The fourth proportional to 5,478, 8,221.48 and 3,837.84 is: 5,759.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478 : 8,221.48 = 3,837.84 : x
  2. Step 2: Convert to fraction form
    5,478/8,221.48 = 3,837.84/x
  3. Step 3: Cross multiply
    5,478x = 8,221.48 × 3,837.84
  4. Step 4: Simplify right side
    5,478x = 31,552,724.80
  5. Step 5: Solve for x
    x = 31,552,724.80/5,478
  6. Step 6: Final answer
    x = 5,759.90

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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.