Home / 5,078.21-7,619.97-2,078.47

Finding the Fourth Proportional to 5,078.21, 7,619.97 and 2,078.47

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Solution

The fourth proportional to 5,078.21, 7,619.97 and 2,078.47 is: 3,118.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.21 : 7,619.97 = 2,078.47 : x
  2. Step 2: Convert to fraction form
    5,078.21/7,619.97 = 2,078.47/x
  3. Step 3: Cross multiply
    5,078.21x = 7,619.97 × 2,078.47
  4. Step 4: Simplify right side
    5,078.21x = 15,837,880.78
  5. Step 5: Solve for x
    x = 15,837,880.78/5,078.21
  6. Step 6: Final answer
    x = 3,118.79

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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.