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Finding the Fourth Proportional to 12,215, 16,856.72 and 6,626

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Solution

The fourth proportional to 12,215, 16,856.72 and 6,626 is: 9,143.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215 : 16,856.72 = 6,626 : x
  2. Step 2: Convert to fraction form
    12,215/16,856.72 = 6,626/x
  3. Step 3: Cross multiply
    12,215x = 16,856.72 × 6,626
  4. Step 4: Simplify right side
    12,215x = 111,692,626.72
  5. Step 5: Solve for x
    x = 111,692,626.72/12,215
  6. Step 6: Final answer
    x = 9,143.89

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.