Home / 4,879.30-6,729.78-3,109.30

Finding the Fourth Proportional to 4,879.30, 6,729.78 and 3,109.30

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Solution

The fourth proportional to 4,879.30, 6,729.78 and 3,109.30 is: 4,288.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,879.30 : 6,729.78 = 3,109.30 : x
  2. Step 2: Convert to fraction form
    4,879.30/6,729.78 = 3,109.30/x
  3. Step 3: Cross multiply
    4,879.30x = 6,729.78 × 3,109.30
  4. Step 4: Simplify right side
    4,879.30x = 20,924,904.95
  5. Step 5: Solve for x
    x = 20,924,904.95/4,879.30
  6. Step 6: Final answer
    x = 4,288.51

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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.