Home / 5,078.87-7,008.60-2,840.30

Finding the Fourth Proportional to 5,078.87, 7,008.60 and 2,840.30

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Solution

The fourth proportional to 5,078.87, 7,008.60 and 2,840.30 is: 3,919.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.87 : 7,008.60 = 2,840.30 : x
  2. Step 2: Convert to fraction form
    5,078.87/7,008.60 = 2,840.30/x
  3. Step 3: Cross multiply
    5,078.87x = 7,008.60 × 2,840.30
  4. Step 4: Simplify right side
    5,078.87x = 19,906,491.54
  5. Step 5: Solve for x
    x = 19,906,491.54/5,078.87
  6. Step 6: Final answer
    x = 3,919.48

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1.5x scale

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.