Home / 12,628.78-18,943.16-3,394.78

Finding the Fourth Proportional to 12,628.78, 18,943.16 and 3,394.78

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Solution

The fourth proportional to 12,628.78, 18,943.16 and 3,394.78 is: 5,092.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,628.78 : 18,943.16 = 3,394.78 : x
  2. Step 2: Convert to fraction form
    12,628.78/18,943.16 = 3,394.78/x
  3. Step 3: Cross multiply
    12,628.78x = 18,943.16 × 3,394.78
  4. Step 4: Simplify right side
    12,628.78x = 64,307,796.37
  5. Step 5: Solve for x
    x = 64,307,796.37/12,628.78
  6. Step 6: Final answer
    x = 5,092.16

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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.