Home / 3,121.20-4,657.50-3,099.60

Finding the Fourth Proportional to 3,121.20, 4,657.50 and 3,099.60

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Solution

The fourth proportional to 3,121.20, 4,657.50 and 3,099.60 is: 4,625.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.20 : 4,657.50 = 3,099.60 : x
  2. Step 2: Convert to fraction form
    3,121.20/4,657.50 = 3,099.60/x
  3. Step 3: Cross multiply
    3,121.20x = 4,657.50 × 3,099.60
  4. Step 4: Simplify right side
    3,121.20x = 14,436,387
  5. Step 5: Solve for x
    x = 14,436,387/3,121.20
  6. Step 6: Final answer
    x = 4,625.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.