Home / 19,640.20-29,460.30-7,961.80

Finding the Fourth Proportional to 19,640.20, 29,460.30 and 7,961.80

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Solution

The fourth proportional to 19,640.20, 29,460.30 and 7,961.80 is: 11,942.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,640.20 : 29,460.30 = 7,961.80 : x
  2. Step 2: Convert to fraction form
    19,640.20/29,460.30 = 7,961.80/x
  3. Step 3: Cross multiply
    19,640.20x = 29,460.30 × 7,961.80
  4. Step 4: Simplify right side
    19,640.20x = 234,557,016.54
  5. Step 5: Solve for x
    x = 234,557,016.54/19,640.20
  6. Step 6: Final answer
    x = 11,942.70

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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.