Home / 3,857.45-5,786.44-1,909.13

Finding the Fourth Proportional to 3,857.45, 5,786.44 and 1,909.13

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Solution

The fourth proportional to 3,857.45, 5,786.44 and 1,909.13 is: 2,863.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.45 : 5,786.44 = 1,909.13 : x
  2. Step 2: Convert to fraction form
    3,857.45/5,786.44 = 1,909.13/x
  3. Step 3: Cross multiply
    3,857.45x = 5,786.44 × 1,909.13
  4. Step 4: Simplify right side
    3,857.45x = 11,047,032.49
  5. Step 5: Solve for x
    x = 11,047,032.49/3,857.45
  6. Step 6: Final answer
    x = 2,863.82

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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.