Home / 3,106.86-4,287.96-1,912.56

Finding the Fourth Proportional to 3,106.86, 4,287.96 and 1,912.56

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Solution

The fourth proportional to 3,106.86, 4,287.96 and 1,912.56 is: 2,639.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.86 : 4,287.96 = 1,912.56 : x
  2. Step 2: Convert to fraction form
    3,106.86/4,287.96 = 1,912.56/x
  3. Step 3: Cross multiply
    3,106.86x = 4,287.96 × 1,912.56
  4. Step 4: Simplify right side
    3,106.86x = 8,200,994.20
  5. Step 5: Solve for x
    x = 8,200,994.20/3,106.86
  6. Step 6: Final answer
    x = 2,639.64

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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.