Home / 2,777.20-4,165.80-2,157.55

Finding the Fourth Proportional to 2,777.20, 4,165.80 and 2,157.55

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Solution

The fourth proportional to 2,777.20, 4,165.80 and 2,157.55 is: 3,236.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,777.20 : 4,165.80 = 2,157.55 : x
  2. Step 2: Convert to fraction form
    2,777.20/4,165.80 = 2,157.55/x
  3. Step 3: Cross multiply
    2,777.20x = 4,165.80 × 2,157.55
  4. Step 4: Simplify right side
    2,777.20x = 8,987,921.79
  5. Step 5: Solve for x
    x = 8,987,921.79/2,777.20
  6. Step 6: Final answer
    x = 3,236.33

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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.