Home / 3,912.08-5,398.68-2,143.72

Finding the Fourth Proportional to 3,912.08, 5,398.68 and 2,143.72

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Solution

The fourth proportional to 3,912.08, 5,398.68 and 2,143.72 is: 2,958.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.08 : 5,398.68 = 2,143.72 : x
  2. Step 2: Convert to fraction form
    3,912.08/5,398.68 = 2,143.72/x
  3. Step 3: Cross multiply
    3,912.08x = 5,398.68 × 2,143.72
  4. Step 4: Simplify right side
    3,912.08x = 11,573,258.29
  5. Step 5: Solve for x
    x = 11,573,258.29/3,912.08
  6. Step 6: Final answer
    x = 2,958.34

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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.