Home / 3,728.07-5,145.57-2,918.94

Finding the Fourth Proportional to 3,728.07, 5,145.57 and 2,918.94

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Solution

The fourth proportional to 3,728.07, 5,145.57 and 2,918.94 is: 4,028.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.07 : 5,145.57 = 2,918.94 : x
  2. Step 2: Convert to fraction form
    3,728.07/5,145.57 = 2,918.94/x
  3. Step 3: Cross multiply
    3,728.07x = 5,145.57 × 2,918.94
  4. Step 4: Simplify right side
    3,728.07x = 15,019,610.10
  5. Step 5: Solve for x
    x = 15,019,610.10/3,728.07
  6. Step 6: Final answer
    x = 4,028.79

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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.