Home / 3,728.85-5,145.18-2,156.64

Finding the Fourth Proportional to 3,728.85, 5,145.18 and 2,156.64

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Solution

The fourth proportional to 3,728.85, 5,145.18 and 2,156.64 is: 2,975.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.85 : 5,145.18 = 2,156.64 : x
  2. Step 2: Convert to fraction form
    3,728.85/5,145.18 = 2,156.64/x
  3. Step 3: Cross multiply
    3,728.85x = 5,145.18 × 2,156.64
  4. Step 4: Simplify right side
    3,728.85x = 11,096,301.00
  5. Step 5: Solve for x
    x = 11,096,301.00/3,728.85
  6. Step 6: Final answer
    x = 2,975.80

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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.