Home / 3,920.87-5,410.91-2,152.55

Finding the Fourth Proportional to 3,920.87, 5,410.91 and 2,152.55

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Solution

The fourth proportional to 3,920.87, 5,410.91 and 2,152.55 is: 2,970.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.87 : 5,410.91 = 2,152.55 : x
  2. Step 2: Convert to fraction form
    3,920.87/5,410.91 = 2,152.55/x
  3. Step 3: Cross multiply
    3,920.87x = 5,410.91 × 2,152.55
  4. Step 4: Simplify right side
    3,920.87x = 11,647,254.32
  5. Step 5: Solve for x
    x = 11,647,254.32/3,920.87
  6. Step 6: Final answer
    x = 2,970.58

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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.