Home / 3,728.17-5,145.35-2,155.96

Finding the Fourth Proportional to 3,728.17, 5,145.35 and 2,155.96

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Solution

The fourth proportional to 3,728.17, 5,145.35 and 2,155.96 is: 2,975.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.17 : 5,145.35 = 2,155.96 : x
  2. Step 2: Convert to fraction form
    3,728.17/5,145.35 = 2,155.96/x
  3. Step 3: Cross multiply
    3,728.17x = 5,145.35 × 2,155.96
  4. Step 4: Simplify right side
    3,728.17x = 11,093,145.14
  5. Step 5: Solve for x
    x = 11,093,145.14/3,728.17
  6. Step 6: Final answer
    x = 2,975.50

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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.