Home / 5,383.80-8,074.62-1,920.78

Finding the Fourth Proportional to 5,383.80, 8,074.62 and 1,920.78

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Solution

The fourth proportional to 5,383.80, 8,074.62 and 1,920.78 is: 2,880.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,383.80 : 8,074.62 = 1,920.78 : x
  2. Step 2: Convert to fraction form
    5,383.80/8,074.62 = 1,920.78/x
  3. Step 3: Cross multiply
    5,383.80x = 8,074.62 × 1,920.78
  4. Step 4: Simplify right side
    5,383.80x = 15,509,568.60
  5. Step 5: Solve for x
    x = 15,509,568.60/5,383.80
  6. Step 6: Final answer
    x = 2,880.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.