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Finding the Fourth Proportional to 19,793.88, 29,698.74 and 11,911.32

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Solution

The fourth proportional to 19,793.88, 29,698.74 and 11,911.32 is: 17,871.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,793.88 : 29,698.74 = 11,911.32 : x
  2. Step 2: Convert to fraction form
    19,793.88/29,698.74 = 11,911.32/x
  3. Step 3: Cross multiply
    19,793.88x = 29,698.74 × 11,911.32
  4. Step 4: Simplify right side
    19,793.88x = 353,751,195.74
  5. Step 5: Solve for x
    x = 353,751,195.74/19,793.88
  6. Step 6: Final answer
    x = 17,871.75

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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.