Home / 5,816.64-8,028.78-3,720.78

Finding the Fourth Proportional to 5,816.64, 8,028.78 and 3,720.78

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Solution

The fourth proportional to 5,816.64, 8,028.78 and 3,720.78 is: 5,135.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,816.64 : 8,028.78 = 3,720.78 : x
  2. Step 2: Convert to fraction form
    5,816.64/8,028.78 = 3,720.78/x
  3. Step 3: Cross multiply
    5,816.64x = 8,028.78 × 3,720.78
  4. Step 4: Simplify right side
    5,816.64x = 29,873,324.05
  5. Step 5: Solve for x
    x = 29,873,324.05/5,816.64
  6. Step 6: Final answer
    x = 5,135.84

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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.