Home / 2,816.56-3,884.52-2,120.08

Finding the Fourth Proportional to 2,816.56, 3,884.52 and 2,120.08

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Solution

The fourth proportional to 2,816.56, 3,884.52 and 2,120.08 is: 2,923.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,816.56 : 3,884.52 = 2,120.08 : x
  2. Step 2: Convert to fraction form
    2,816.56/3,884.52 = 2,120.08/x
  3. Step 3: Cross multiply
    2,816.56x = 3,884.52 × 2,120.08
  4. Step 4: Simplify right side
    2,816.56x = 8,235,493.16
  5. Step 5: Solve for x
    x = 8,235,493.16/2,816.56
  6. Step 6: Final answer
    x = 2,923.95

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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.