Home / 3,939.08-5,435.86-2,170.64

Finding the Fourth Proportional to 3,939.08, 5,435.86 and 2,170.64

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Solution

The fourth proportional to 3,939.08, 5,435.86 and 2,170.64 is: 2,995.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.08 : 5,435.86 = 2,170.64 : x
  2. Step 2: Convert to fraction form
    3,939.08/5,435.86 = 2,170.64/x
  3. Step 3: Cross multiply
    3,939.08x = 5,435.86 × 2,170.64
  4. Step 4: Simplify right side
    3,939.08x = 11,799,295.15
  5. Step 5: Solve for x
    x = 11,799,295.15/3,939.08
  6. Step 6: Final answer
    x = 2,995.44

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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.