Home / 6,930.78-10,394.89-1,999.20

Finding the Fourth Proportional to 6,930.78, 10,394.89 and 1,999.20

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Solution

The fourth proportional to 6,930.78, 10,394.89 and 1,999.20 is: 2,998.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,930.78 : 10,394.89 = 1,999.20 : x
  2. Step 2: Convert to fraction form
    6,930.78/10,394.89 = 1,999.20/x
  3. Step 3: Cross multiply
    6,930.78x = 10,394.89 × 1,999.20
  4. Step 4: Simplify right side
    6,930.78x = 20,781,464.09
  5. Step 5: Solve for x
    x = 20,781,464.09/6,930.78
  6. Step 6: Final answer
    x = 2,998.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.