Home / 3,415.20-5,127.60-2,119.20

Finding the Fourth Proportional to 3,415.20, 5,127.60 and 2,119.20

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Solution

The fourth proportional to 3,415.20, 5,127.60 and 2,119.20 is: 3,181.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,415.20 : 5,127.60 = 2,119.20 : x
  2. Step 2: Convert to fraction form
    3,415.20/5,127.60 = 2,119.20/x
  3. Step 3: Cross multiply
    3,415.20x = 5,127.60 × 2,119.20
  4. Step 4: Simplify right side
    3,415.20x = 10,866,409.92
  5. Step 5: Solve for x
    x = 10,866,409.92/3,415.20
  6. Step 6: Final answer
    x = 3,181.78

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1.5x scale

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.