Home / 5,111.40-7,671.60-3,028.80

Finding the Fourth Proportional to 5,111.40, 7,671.60 and 3,028.80

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Solution

The fourth proportional to 5,111.40, 7,671.60 and 3,028.80 is: 4,545.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,111.40 : 7,671.60 = 3,028.80 : x
  2. Step 2: Convert to fraction form
    5,111.40/7,671.60 = 3,028.80/x
  3. Step 3: Cross multiply
    5,111.40x = 7,671.60 × 3,028.80
  4. Step 4: Simplify right side
    5,111.40x = 23,235,742.08
  5. Step 5: Solve for x
    x = 23,235,742.08/5,111.40
  6. Step 6: Final answer
    x = 4,545.87

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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.