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Finding the Fourth Proportional to 22,396.60, 30,905.30 and 12,965.80

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Solution

The fourth proportional to 22,396.60, 30,905.30 and 12,965.80 is: 17,891.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,396.60 : 30,905.30 = 12,965.80 : x
  2. Step 2: Convert to fraction form
    22,396.60/30,905.30 = 12,965.80/x
  3. Step 3: Cross multiply
    22,396.60x = 30,905.30 × 12,965.80
  4. Step 4: Simplify right side
    22,396.60x = 400,711,938.74
  5. Step 5: Solve for x
    x = 400,711,938.74/22,396.60
  6. Step 6: Final answer
    x = 17,891.64

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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.