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Finding the Fourth Proportional to 20,354, 28,086.23 and 11,857.91

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Solution

The fourth proportional to 20,354, 28,086.23 and 11,857.91 is: 16,362.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,354 : 28,086.23 = 11,857.91 : x
  2. Step 2: Convert to fraction form
    20,354/28,086.23 = 11,857.91/x
  3. Step 3: Cross multiply
    20,354x = 28,086.23 × 11,857.91
  4. Step 4: Simplify right side
    20,354x = 333,043,928.29
  5. Step 5: Solve for x
    x = 333,043,928.29/20,354
  6. Step 6: Final answer
    x = 16,362.58

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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.