Home / 3,878.10-5,351.90-2,199.42

Finding the Fourth Proportional to 3,878.10, 5,351.90 and 2,199.42

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Solution

The fourth proportional to 3,878.10, 5,351.90 and 2,199.42 is: 3,035.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.10 : 5,351.90 = 2,199.42 : x
  2. Step 2: Convert to fraction form
    3,878.10/5,351.90 = 2,199.42/x
  3. Step 3: Cross multiply
    3,878.10x = 5,351.90 × 2,199.42
  4. Step 4: Simplify right side
    3,878.10x = 11,771,064.90
  5. Step 5: Solve for x
    x = 11,771,064.90/3,878.10
  6. Step 6: Final answer
    x = 3,035.27

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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.