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Finding the Fourth Proportional to 19,980.22, 29,919.22 and 19,388.97

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Solution

The fourth proportional to 19,980.22, 29,919.22 and 19,388.97 is: 29,033.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.22 : 29,919.22 = 19,388.97 : x
  2. Step 2: Convert to fraction form
    19,980.22/29,919.22 = 19,388.97/x
  3. Step 3: Cross multiply
    19,980.22x = 29,919.22 × 19,388.97
  4. Step 4: Simplify right side
    19,980.22x = 580,102,919.59
  5. Step 5: Solve for x
    x = 580,102,919.59/19,980.22
  6. Step 6: Final answer
    x = 29,033.86

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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.