Home / 13,290.78-19,936.16-3,930.92

Finding the Fourth Proportional to 13,290.78, 19,936.16 and 3,930.92

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Solution

The fourth proportional to 13,290.78, 19,936.16 and 3,930.92 is: 5,896.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.78 : 19,936.16 = 3,930.92 : x
  2. Step 2: Convert to fraction form
    13,290.78/19,936.16 = 3,930.92/x
  3. Step 3: Cross multiply
    13,290.78x = 19,936.16 × 3,930.92
  4. Step 4: Simplify right side
    13,290.78x = 78,367,450.07
  5. Step 5: Solve for x
    x = 78,367,450.07/13,290.78
  6. Step 6: Final answer
    x = 5,896.38

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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.