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Finding the Fourth Proportional to 11,679, 17,518.50 and 3,471

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Solution

The fourth proportional to 11,679, 17,518.50 and 3,471 is: 5,206.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,679 : 17,518.50 = 3,471 : x
  2. Step 2: Convert to fraction form
    11,679/17,518.50 = 3,471/x
  3. Step 3: Cross multiply
    11,679x = 17,518.50 × 3,471
  4. Step 4: Simplify right side
    11,679x = 60,806,713.50
  5. Step 5: Solve for x
    x = 60,806,713.50/11,679
  6. Step 6: Final answer
    x = 5,206.50

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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.