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Finding the Fourth Proportional to 22,308.20, 30,785.70 and 12,236.60

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Solution

The fourth proportional to 22,308.20, 30,785.70 and 12,236.60 is: 16,886.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,308.20 : 30,785.70 = 12,236.60 : x
  2. Step 2: Convert to fraction form
    22,308.20/30,785.70 = 12,236.60/x
  3. Step 3: Cross multiply
    22,308.20x = 30,785.70 × 12,236.60
  4. Step 4: Simplify right side
    22,308.20x = 376,712,296.62
  5. Step 5: Solve for x
    x = 376,712,296.62/22,308.20
  6. Step 6: Final answer
    x = 16,886.72

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.