Home / 12,121.84-16,728.83-8,081.70

Finding the Fourth Proportional to 12,121.84, 16,728.83 and 8,081.70

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Solution

The fourth proportional to 12,121.84, 16,728.83 and 8,081.70 is: 11,153.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.84 : 16,728.83 = 8,081.70 : x
  2. Step 2: Convert to fraction form
    12,121.84/16,728.83 = 8,081.70/x
  3. Step 3: Cross multiply
    12,121.84x = 16,728.83 × 8,081.70
  4. Step 4: Simplify right side
    12,121.84x = 135,197,385.41
  5. Step 5: Solve for x
    x = 135,197,385.41/12,121.84
  6. Step 6: Final answer
    x = 11,153.21

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Double 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.