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Finding the Fourth Proportional to 18,986.81, 26,186.90 and 12,273.93

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Solution

The fourth proportional to 18,986.81, 26,186.90 and 12,273.93 is: 16,928.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,986.81 : 26,186.90 = 12,273.93 : x
  2. Step 2: Convert to fraction form
    18,986.81/26,186.90 = 12,273.93/x
  3. Step 3: Cross multiply
    18,986.81x = 26,186.90 × 12,273.93
  4. Step 4: Simplify right side
    18,986.81x = 321,416,116.15
  5. Step 5: Solve for x
    x = 321,416,116.15/18,986.81
  6. Step 6: Final answer
    x = 16,928.39

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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.