Home / 3,780.36-5,215.77-2,991.96

Finding the Fourth Proportional to 3,780.36, 5,215.77 and 2,991.96

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Solution

The fourth proportional to 3,780.36, 5,215.77 and 2,991.96 is: 4,128.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.36 : 5,215.77 = 2,991.96 : x
  2. Step 2: Convert to fraction form
    3,780.36/5,215.77 = 2,991.96/x
  3. Step 3: Cross multiply
    3,780.36x = 5,215.77 × 2,991.96
  4. Step 4: Simplify right side
    3,780.36x = 15,605,375.21
  5. Step 5: Solve for x
    x = 15,605,375.21/3,780.36
  6. Step 6: Final answer
    x = 4,128.01

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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.