Home / 2,785.96-3,845.99-2,155.06

Finding the Fourth Proportional to 2,785.96, 3,845.99 and 2,155.06

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Solution

The fourth proportional to 2,785.96, 3,845.99 and 2,155.06 is: 2,975.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.96 : 3,845.99 = 2,155.06 : x
  2. Step 2: Convert to fraction form
    2,785.96/3,845.99 = 2,155.06/x
  3. Step 3: Cross multiply
    2,785.96x = 3,845.99 × 2,155.06
  4. Step 4: Simplify right side
    2,785.96x = 8,288,309.20
  5. Step 5: Solve for x
    x = 8,288,309.20/2,785.96
  6. Step 6: Final answer
    x = 2,975.03

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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.