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Finding the Fourth Proportional to 19,659.88, 29,481.54 and 7,964.92

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Solution

The fourth proportional to 19,659.88, 29,481.54 and 7,964.92 is: 11,944.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,659.88 : 29,481.54 = 7,964.92 : x
  2. Step 2: Convert to fraction form
    19,659.88/29,481.54 = 7,964.92/x
  3. Step 3: Cross multiply
    19,659.88x = 29,481.54 × 7,964.92
  4. Step 4: Simplify right side
    19,659.88x = 234,818,107.58
  5. Step 5: Solve for x
    x = 234,818,107.58/19,659.88
  6. Step 6: Final answer
    x = 11,944.03

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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.