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Finding the Fourth Proportional to 11,378, 17,069.88 and 3,170

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Solution

The fourth proportional to 11,378, 17,069.88 and 3,170 is: 4,755.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,378 : 17,069.88 = 3,170 : x
  2. Step 2: Convert to fraction form
    11,378/17,069.88 = 3,170/x
  3. Step 3: Cross multiply
    11,378x = 17,069.88 × 3,170
  4. Step 4: Simplify right side
    11,378x = 54,111,519.60
  5. Step 5: Solve for x
    x = 54,111,519.60/11,378
  6. Step 6: Final answer
    x = 4,755.80

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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.