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Finding the Fourth Proportional to 12,215.50, 16,857.48 and 6,626.50

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Solution

The fourth proportional to 12,215.50, 16,857.48 and 6,626.50 is: 9,144.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215.50 : 16,857.48 = 6,626.50 : x
  2. Step 2: Convert to fraction form
    12,215.50/16,857.48 = 6,626.50/x
  3. Step 3: Cross multiply
    12,215.50x = 16,857.48 × 6,626.50
  4. Step 4: Simplify right side
    12,215.50x = 111,706,091.22
  5. Step 5: Solve for x
    x = 111,706,091.22/12,215.50
  6. Step 6: Final answer
    x = 9,144.62

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1.5x scale

Why These Related Problems?

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