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Finding the Fourth Proportional to 18,762.96, 28,059.12 and 14,022.48

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Solution

The fourth proportional to 18,762.96, 28,059.12 and 14,022.48 is: 20,969.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,762.96 : 28,059.12 = 14,022.48 : x
  2. Step 2: Convert to fraction form
    18,762.96/28,059.12 = 14,022.48/x
  3. Step 3: Cross multiply
    18,762.96x = 28,059.12 × 14,022.48
  4. Step 4: Simplify right side
    18,762.96x = 393,458,449.02
  5. Step 5: Solve for x
    x = 393,458,449.02/18,762.96
  6. Step 6: Final answer
    x = 20,969.96

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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.