Home / 3,728.28-5,145.04-2,156.36

Finding the Fourth Proportional to 3,728.28, 5,145.04 and 2,156.36

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Solution

The fourth proportional to 3,728.28, 5,145.04 and 2,156.36 is: 2,975.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.28 : 5,145.04 = 2,156.36 : x
  2. Step 2: Convert to fraction form
    3,728.28/5,145.04 = 2,156.36/x
  3. Step 3: Cross multiply
    3,728.28x = 5,145.04 × 2,156.36
  4. Step 4: Simplify right side
    3,728.28x = 11,094,558.45
  5. Step 5: Solve for x
    x = 11,094,558.45/3,728.28
  6. Step 6: Final answer
    x = 2,975.78

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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.