Home / 3,170.86-4,374.80-1,912.30

Finding the Fourth Proportional to 3,170.86, 4,374.80 and 1,912.30

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Solution

The fourth proportional to 3,170.86, 4,374.80 and 1,912.30 is: 2,638.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,170.86 : 4,374.80 = 1,912.30 : x
  2. Step 2: Convert to fraction form
    3,170.86/4,374.80 = 1,912.30/x
  3. Step 3: Cross multiply
    3,170.86x = 4,374.80 × 1,912.30
  4. Step 4: Simplify right side
    3,170.86x = 8,365,920.48
  5. Step 5: Solve for x
    x = 8,365,920.48/3,170.86
  6. Step 6: Final answer
    x = 2,638.38

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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.