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Finding the Fourth Proportional to 12,630.45, 18,939.39 and 7,367.28

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Solution

The fourth proportional to 12,630.45, 18,939.39 and 7,367.28 is: 11,047.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,630.45 : 18,939.39 = 7,367.28 : x
  2. Step 2: Convert to fraction form
    12,630.45/18,939.39 = 7,367.28/x
  3. Step 3: Cross multiply
    12,630.45x = 18,939.39 × 7,367.28
  4. Step 4: Simplify right side
    12,630.45x = 139,531,789.16
  5. Step 5: Solve for x
    x = 139,531,789.16/12,630.45
  6. Step 6: Final answer
    x = 11,047.25

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.