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Finding the Fourth Proportional to 15,235, 21,027.18 and 8,611

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Solution

The fourth proportional to 15,235, 21,027.18 and 8,611 is: 11,884.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,235 : 21,027.18 = 8,611 : x
  2. Step 2: Convert to fraction form
    15,235/21,027.18 = 8,611/x
  3. Step 3: Cross multiply
    15,235x = 21,027.18 × 8,611
  4. Step 4: Simplify right side
    15,235x = 181,065,046.98
  5. Step 5: Solve for x
    x = 181,065,046.98/15,235
  6. Step 6: Final answer
    x = 11,884.81

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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.