Home / 3,722.78-5,138.10-2,783.28

Finding the Fourth Proportional to 3,722.78, 5,138.10 and 2,783.28

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Solution

The fourth proportional to 3,722.78, 5,138.10 and 2,783.28 is: 3,841.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,722.78 : 5,138.10 = 2,783.28 : x
  2. Step 2: Convert to fraction form
    3,722.78/5,138.10 = 2,783.28/x
  3. Step 3: Cross multiply
    3,722.78x = 5,138.10 × 2,783.28
  4. Step 4: Simplify right side
    3,722.78x = 14,300,770.97
  5. Step 5: Solve for x
    x = 14,300,770.97/3,722.78
  6. Step 6: Final answer
    x = 3,841.42

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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.