Home / 3,856.62-5,783.73-1,391.12

Finding the Fourth Proportional to 3,856.62, 5,783.73 and 1,391.12

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Solution

The fourth proportional to 3,856.62, 5,783.73 and 1,391.12 is: 2,086.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.62 : 5,783.73 = 1,391.12 : x
  2. Step 2: Convert to fraction form
    3,856.62/5,783.73 = 1,391.12/x
  3. Step 3: Cross multiply
    3,856.62x = 5,783.73 × 1,391.12
  4. Step 4: Simplify right side
    3,856.62x = 8,045,862.48
  5. Step 5: Solve for x
    x = 8,045,862.48/3,856.62
  6. Step 6: Final answer
    x = 2,086.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.