Home / 12,183.72-16,813.89-6,878.76

Finding the Fourth Proportional to 12,183.72, 16,813.89 and 6,878.76

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Solution

The fourth proportional to 12,183.72, 16,813.89 and 6,878.76 is: 9,492.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,183.72 : 16,813.89 = 6,878.76 : x
  2. Step 2: Convert to fraction form
    12,183.72/16,813.89 = 6,878.76/x
  3. Step 3: Cross multiply
    12,183.72x = 16,813.89 × 6,878.76
  4. Step 4: Simplify right side
    12,183.72x = 115,658,713.98
  5. Step 5: Solve for x
    x = 115,658,713.98/12,183.72
  6. Step 6: Final answer
    x = 9,492.89

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Half scale
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Double scale
Find fourth proportional to 12,184.72, 16,815.27 and 6,879.76
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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.