Home / 3,926.87-5,419.16-2,158.58

Finding the Fourth Proportional to 3,926.87, 5,419.16 and 2,158.58

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Solution

The fourth proportional to 3,926.87, 5,419.16 and 2,158.58 is: 2,978.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,926.87 : 5,419.16 = 2,158.58 : x
  2. Step 2: Convert to fraction form
    3,926.87/5,419.16 = 2,158.58/x
  3. Step 3: Cross multiply
    3,926.87x = 5,419.16 × 2,158.58
  4. Step 4: Simplify right side
    3,926.87x = 11,697,652.50
  5. Step 5: Solve for x
    x = 11,697,652.50/3,926.87
  6. Step 6: Final answer
    x = 2,978.88

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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.