Home / 2,820.94-3,895.96-1,939.30

Finding the Fourth Proportional to 2,820.94, 3,895.96 and 1,939.30

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Solution

The fourth proportional to 2,820.94, 3,895.96 and 1,939.30 is: 2,678.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.94 : 3,895.96 = 1,939.30 : x
  2. Step 2: Convert to fraction form
    2,820.94/3,895.96 = 1,939.30/x
  3. Step 3: Cross multiply
    2,820.94x = 3,895.96 × 1,939.30
  4. Step 4: Simplify right side
    2,820.94x = 7,555,415.75
  5. Step 5: Solve for x
    x = 7,555,415.75/2,820.94
  6. Step 6: Final answer
    x = 2,678.34

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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.