Home / 5,179.68-7,139.88-3,851.28

Finding the Fourth Proportional to 5,179.68, 7,139.88 and 3,851.28

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Solution

The fourth proportional to 5,179.68, 7,139.88 and 3,851.28 is: 5,308.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.68 : 7,139.88 = 3,851.28 : x
  2. Step 2: Convert to fraction form
    5,179.68/7,139.88 = 3,851.28/x
  3. Step 3: Cross multiply
    5,179.68x = 7,139.88 × 3,851.28
  4. Step 4: Simplify right side
    5,179.68x = 27,497,677.05
  5. Step 5: Solve for x
    x = 27,497,677.05/5,179.68
  6. Step 6: Final answer
    x = 5,308.76

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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.