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Finding the Fourth Proportional to 11,887, 17,830.50 and 3,679

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Solution

The fourth proportional to 11,887, 17,830.50 and 3,679 is: 5,518.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,887 : 17,830.50 = 3,679 : x
  2. Step 2: Convert to fraction form
    11,887/17,830.50 = 3,679/x
  3. Step 3: Cross multiply
    11,887x = 17,830.50 × 3,679
  4. Step 4: Simplify right side
    11,887x = 65,598,409.50
  5. Step 5: Solve for x
    x = 65,598,409.50/11,887
  6. Step 6: Final answer
    x = 5,518.50

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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.