Home / 3,920.85-5,410.73-2,152.49

Finding the Fourth Proportional to 3,920.85, 5,410.73 and 2,152.49

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Solution

The fourth proportional to 3,920.85, 5,410.73 and 2,152.49 is: 2,970.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.85 : 5,410.73 = 2,152.49 : x
  2. Step 2: Convert to fraction form
    3,920.85/5,410.73 = 2,152.49/x
  3. Step 3: Cross multiply
    3,920.85x = 5,410.73 × 2,152.49
  4. Step 4: Simplify right side
    3,920.85x = 11,646,520.55
  5. Step 5: Solve for x
    x = 11,646,520.55/3,920.85
  6. Step 6: Final answer
    x = 2,970.41

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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.