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Finding the Fourth Proportional to 12,105.30, 16,706.16 and 6,728.39

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Solution

The fourth proportional to 12,105.30, 16,706.16 and 6,728.39 is: 9,285.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,105.30 : 16,706.16 = 6,728.39 : x
  2. Step 2: Convert to fraction form
    12,105.30/16,706.16 = 6,728.39/x
  3. Step 3: Cross multiply
    12,105.30x = 16,706.16 × 6,728.39
  4. Step 4: Simplify right side
    12,105.30x = 112,405,476.35
  5. Step 5: Solve for x
    x = 112,405,476.35/12,105.30
  6. Step 6: Final answer
    x = 9,285.64

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Half scale
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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.