Home / 3,786.45-5,220.75-3,157.89

Finding the Fourth Proportional to 3,786.45, 5,220.75 and 3,157.89

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Solution

The fourth proportional to 3,786.45, 5,220.75 and 3,157.89 is: 4,354.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,786.45 : 5,220.75 = 3,157.89 : x
  2. Step 2: Convert to fraction form
    3,786.45/5,220.75 = 3,157.89/x
  3. Step 3: Cross multiply
    3,786.45x = 5,220.75 × 3,157.89
  4. Step 4: Simplify right side
    3,786.45x = 16,486,554.22
  5. Step 5: Solve for x
    x = 16,486,554.22/3,786.45
  6. Step 6: Final answer
    x = 4,354.09

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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.