Home / 3,778.79-5,214.15-2,100.21

Finding the Fourth Proportional to 3,778.79, 5,214.15 and 2,100.21

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Solution

The fourth proportional to 3,778.79, 5,214.15 and 2,100.21 is: 2,897.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,778.79 : 5,214.15 = 2,100.21 : x
  2. Step 2: Convert to fraction form
    3,778.79/5,214.15 = 2,100.21/x
  3. Step 3: Cross multiply
    3,778.79x = 5,214.15 × 2,100.21
  4. Step 4: Simplify right side
    3,778.79x = 10,950,790.42
  5. Step 5: Solve for x
    x = 10,950,790.42/3,778.79
  6. Step 6: Final answer
    x = 2,897.97

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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.