Home / 3,728.12-5,145.45-2,157.08

Finding the Fourth Proportional to 3,728.12, 5,145.45 and 2,157.08

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Solution

The fourth proportional to 3,728.12, 5,145.45 and 2,157.08 is: 2,977.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.12 : 5,145.45 = 2,157.08 : x
  2. Step 2: Convert to fraction form
    3,728.12/5,145.45 = 2,157.08/x
  3. Step 3: Cross multiply
    3,728.12x = 5,145.45 × 2,157.08
  4. Step 4: Simplify right side
    3,728.12x = 11,099,147.29
  5. Step 5: Solve for x
    x = 11,099,147.29/3,728.12
  6. Step 6: Final answer
    x = 2,977.14

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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.