Home / 5,455-8,171.64-2,529.28

Finding the Fourth Proportional to 5,455, 8,171.64 and 2,529.28

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Solution

The fourth proportional to 5,455, 8,171.64 and 2,529.28 is: 3,788.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,455 : 8,171.64 = 2,529.28 : x
  2. Step 2: Convert to fraction form
    5,455/8,171.64 = 2,529.28/x
  3. Step 3: Cross multiply
    5,455x = 8,171.64 × 2,529.28
  4. Step 4: Simplify right side
    5,455x = 20,668,365.62
  5. Step 5: Solve for x
    x = 20,668,365.62/5,455
  6. Step 6: Final answer
    x = 3,788.88

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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.