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Finding the Fourth Proportional to 11,040.72, 16,566.64 and 6,879.68

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Solution

The fourth proportional to 11,040.72, 16,566.64 and 6,879.68 is: 10,322.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,040.72 : 16,566.64 = 6,879.68 : x
  2. Step 2: Convert to fraction form
    11,040.72/16,566.64 = 6,879.68/x
  3. Step 3: Cross multiply
    11,040.72x = 16,566.64 × 6,879.68
  4. Step 4: Simplify right side
    11,040.72x = 113,973,181.88
  5. Step 5: Solve for x
    x = 113,973,181.88/11,040.72
  6. Step 6: Final answer
    x = 10,322.98

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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.