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Finding the Fourth Proportional to 12,135.99, 18,203.97 and 3,816.73

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Solution

The fourth proportional to 12,135.99, 18,203.97 and 3,816.73 is: 5,725.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,135.99 : 18,203.97 = 3,816.73 : x
  2. Step 2: Convert to fraction form
    12,135.99/18,203.97 = 3,816.73/x
  3. Step 3: Cross multiply
    12,135.99x = 18,203.97 × 3,816.73
  4. Step 4: Simplify right side
    12,135.99x = 69,479,638.42
  5. Step 5: Solve for x
    x = 69,479,638.42/12,135.99
  6. Step 6: Final answer
    x = 5,725.09

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.