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Finding the Fourth Proportional to 19,166.40, 28,722.60 and 15,224.40

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Solution

The fourth proportional to 19,166.40, 28,722.60 and 15,224.40 is: 22,815.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,166.40 : 28,722.60 = 15,224.40 : x
  2. Step 2: Convert to fraction form
    19,166.40/28,722.60 = 15,224.40/x
  3. Step 3: Cross multiply
    19,166.40x = 28,722.60 × 15,224.40
  4. Step 4: Simplify right side
    19,166.40x = 437,284,351.44
  5. Step 5: Solve for x
    x = 437,284,351.44/19,166.40
  6. Step 6: Final answer
    x = 22,815.15

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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.