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Finding the Fourth Proportional to 11,660.78, 17,479.55 and 9,324.79

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Solution

The fourth proportional to 11,660.78, 17,479.55 and 9,324.79 is: 13,977.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,660.78 : 17,479.55 = 9,324.79 : x
  2. Step 2: Convert to fraction form
    11,660.78/17,479.55 = 9,324.79/x
  3. Step 3: Cross multiply
    11,660.78x = 17,479.55 × 9,324.79
  4. Step 4: Simplify right side
    11,660.78x = 162,993,112.66
  5. Step 5: Solve for x
    x = 162,993,112.66/11,660.78
  6. Step 6: Final answer
    x = 13,977.89

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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.