Home / 3,856.20-5,786.40-2,101.10

Finding the Fourth Proportional to 3,856.20, 5,786.40 and 2,101.10

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Solution

The fourth proportional to 3,856.20, 5,786.40 and 2,101.10 is: 3,152.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.20 : 5,786.40 = 2,101.10 : x
  2. Step 2: Convert to fraction form
    3,856.20/5,786.40 = 2,101.10/x
  3. Step 3: Cross multiply
    3,856.20x = 5,786.40 × 2,101.10
  4. Step 4: Simplify right side
    3,856.20x = 12,157,805.04
  5. Step 5: Solve for x
    x = 12,157,805.04/3,856.20
  6. Step 6: Final answer
    x = 3,152.79

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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.