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Finding the Fourth Proportional to 20,021.99, 27,629.91 and 11,068.99

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Solution

The fourth proportional to 20,021.99, 27,629.91 and 11,068.99 is: 15,274.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,021.99 : 27,629.91 = 11,068.99 : x
  2. Step 2: Convert to fraction form
    20,021.99/27,629.91 = 11,068.99/x
  3. Step 3: Cross multiply
    20,021.99x = 27,629.91 × 11,068.99
  4. Step 4: Simplify right side
    20,021.99x = 305,835,128.42
  5. Step 5: Solve for x
    x = 305,835,128.42/20,021.99
  6. Step 6: Final answer
    x = 15,274.97

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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.