Home / 4,907.20-6,771.78-2,811.28

Finding the Fourth Proportional to 4,907.20, 6,771.78 and 2,811.28

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Solution

The fourth proportional to 4,907.20, 6,771.78 and 2,811.28 is: 3,879.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,907.20 : 6,771.78 = 2,811.28 : x
  2. Step 2: Convert to fraction form
    4,907.20/6,771.78 = 2,811.28/x
  3. Step 3: Cross multiply
    4,907.20x = 6,771.78 × 2,811.28
  4. Step 4: Simplify right side
    4,907.20x = 19,037,369.68
  5. Step 5: Solve for x
    x = 19,037,369.68/4,907.20
  6. Step 6: Final answer
    x = 3,879.48

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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.