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Finding the Fourth Proportional to 8,740, 13,111.92 and 3,268

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Solution

The fourth proportional to 8,740, 13,111.92 and 3,268 is: 4,902.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,740 : 13,111.92 = 3,268 : x
  2. Step 2: Convert to fraction form
    8,740/13,111.92 = 3,268/x
  3. Step 3: Cross multiply
    8,740x = 13,111.92 × 3,268
  4. Step 4: Simplify right side
    8,740x = 42,849,754.56
  5. Step 5: Solve for x
    x = 42,849,754.56/8,740
  6. Step 6: Final answer
    x = 4,902.72

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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.