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Finding the Fourth Proportional to 12,215.39, 16,857.21 and 6,626.39

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Solution

The fourth proportional to 12,215.39, 16,857.21 and 6,626.39 is: 9,144.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215.39 : 16,857.21 = 6,626.39 : x
  2. Step 2: Convert to fraction form
    12,215.39/16,857.21 = 6,626.39/x
  3. Step 3: Cross multiply
    12,215.39x = 16,857.21 × 6,626.39
  4. Step 4: Simplify right side
    12,215.39x = 111,702,447.77
  5. Step 5: Solve for x
    x = 111,702,447.77/12,215.39
  6. Step 6: Final answer
    x = 9,144.40

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Half scale
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Double scale
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Similar ratio
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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.