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Finding the Fourth Proportional to 11,481.79, 15,843.69 and 7,704.20

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Solution

The fourth proportional to 11,481.79, 15,843.69 and 7,704.20 is: 10,631.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,481.79 : 15,843.69 = 7,704.20 : x
  2. Step 2: Convert to fraction form
    11,481.79/15,843.69 = 7,704.20/x
  3. Step 3: Cross multiply
    11,481.79x = 15,843.69 × 7,704.20
  4. Step 4: Simplify right side
    11,481.79x = 122,062,956.50
  5. Step 5: Solve for x
    x = 122,062,956.50/11,481.79
  6. Step 6: Final answer
    x = 10,631.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.