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Finding the Fourth Proportional to 18,810.63, 28,325.88 and 13,914.81

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Solution

The fourth proportional to 18,810.63, 28,325.88 and 13,914.81 is: 20,953.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810.63 : 28,325.88 = 13,914.81 : x
  2. Step 2: Convert to fraction form
    18,810.63/28,325.88 = 13,914.81/x
  3. Step 3: Cross multiply
    18,810.63x = 28,325.88 × 13,914.81
  4. Step 4: Simplify right side
    18,810.63x = 394,149,238.28
  5. Step 5: Solve for x
    x = 394,149,238.28/18,810.63
  6. Step 6: Final answer
    x = 20,953.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.