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Finding the Fourth Proportional to 20,185.60, 30,213.60 and 14,353.60

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Solution

The fourth proportional to 20,185.60, 30,213.60 and 14,353.60 is: 21,484.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,185.60 : 30,213.60 = 14,353.60 : x
  2. Step 2: Convert to fraction form
    20,185.60/30,213.60 = 14,353.60/x
  3. Step 3: Cross multiply
    20,185.60x = 30,213.60 × 14,353.60
  4. Step 4: Simplify right side
    20,185.60x = 433,673,928.96
  5. Step 5: Solve for x
    x = 433,673,928.96/20,185.60
  6. Step 6: Final answer
    x = 21,484.32

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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.