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Finding the Fourth Proportional to 11,759, 17,638.50 and 3,551

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Solution

The fourth proportional to 11,759, 17,638.50 and 3,551 is: 5,326.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,759 : 17,638.50 = 3,551 : x
  2. Step 2: Convert to fraction form
    11,759/17,638.50 = 3,551/x
  3. Step 3: Cross multiply
    11,759x = 17,638.50 × 3,551
  4. Step 4: Simplify right side
    11,759x = 62,634,313.50
  5. Step 5: Solve for x
    x = 62,634,313.50/11,759
  6. Step 6: Final answer
    x = 5,326.50

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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.