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Finding the Fourth Proportional to 20,400.99, 30,601.34 and 11,100.14

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Solution

The fourth proportional to 20,400.99, 30,601.34 and 11,100.14 is: 16,650.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.99 : 30,601.34 = 11,100.14 : x
  2. Step 2: Convert to fraction form
    20,400.99/30,601.34 = 11,100.14/x
  3. Step 3: Cross multiply
    20,400.99x = 30,601.34 × 11,100.14
  4. Step 4: Simplify right side
    20,400.99x = 339,679,168.50
  5. Step 5: Solve for x
    x = 339,679,168.50/20,400.99
  6. Step 6: Final answer
    x = 16,650.13

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Half scale
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Double scale
Find fourth proportional to 20,401.99, 30,602.84 and 11,101.14
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.