Home / 3,920.68-5,410.74-2,152.36

Finding the Fourth Proportional to 3,920.68, 5,410.74 and 2,152.36

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Solution

The fourth proportional to 3,920.68, 5,410.74 and 2,152.36 is: 2,970.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.68 : 5,410.74 = 2,152.36 : x
  2. Step 2: Convert to fraction form
    3,920.68/5,410.74 = 2,152.36/x
  3. Step 3: Cross multiply
    3,920.68x = 5,410.74 × 2,152.36
  4. Step 4: Simplify right side
    3,920.68x = 11,645,860.35
  5. Step 5: Solve for x
    x = 11,645,860.35/3,920.68
  6. Step 6: Final answer
    x = 2,970.37

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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.