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Finding the Fourth Proportional to 22,138.60, 30,590.18 and 17,698.99

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Solution

The fourth proportional to 22,138.60, 30,590.18 and 17,698.99 is: 24,455.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,138.60 : 30,590.18 = 17,698.99 : x
  2. Step 2: Convert to fraction form
    22,138.60/30,590.18 = 17,698.99/x
  3. Step 3: Cross multiply
    22,138.60x = 30,590.18 × 17,698.99
  4. Step 4: Simplify right side
    22,138.60x = 541,415,289.92
  5. Step 5: Solve for x
    x = 541,415,289.92/22,138.60
  6. Step 6: Final answer
    x = 24,455.71

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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.