Home / 3,728.55-5,145.26-2,156.43

Finding the Fourth Proportional to 3,728.55, 5,145.26 and 2,156.43

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Solution

The fourth proportional to 3,728.55, 5,145.26 and 2,156.43 is: 2,975.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.55 : 5,145.26 = 2,156.43 : x
  2. Step 2: Convert to fraction form
    3,728.55/5,145.26 = 2,156.43/x
  3. Step 3: Cross multiply
    3,728.55x = 5,145.26 × 2,156.43
  4. Step 4: Simplify right side
    3,728.55x = 11,095,382.24
  5. Step 5: Solve for x
    x = 11,095,382.24/3,728.55
  6. Step 6: Final answer
    x = 2,975.79

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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.