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Finding the Fourth Proportional to 8,631.54, 11,911.65 and 6,745.32

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Solution

The fourth proportional to 8,631.54, 11,911.65 and 6,745.32 is: 9,308.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.54 : 11,911.65 = 6,745.32 : x
  2. Step 2: Convert to fraction form
    8,631.54/11,911.65 = 6,745.32/x
  3. Step 3: Cross multiply
    8,631.54x = 11,911.65 × 6,745.32
  4. Step 4: Simplify right side
    8,631.54x = 80,347,890.98
  5. Step 5: Solve for x
    x = 80,347,890.98/8,631.54
  6. Step 6: Final answer
    x = 9,308.64

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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.