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Finding the Fourth Proportional to 28,188, 42,280.38 and 8,466.12

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Solution

The fourth proportional to 28,188, 42,280.38 and 8,466.12 is: 12,698.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,188 : 42,280.38 = 8,466.12 : x
  2. Step 2: Convert to fraction form
    28,188/42,280.38 = 8,466.12/x
  3. Step 3: Cross multiply
    28,188x = 42,280.38 × 8,466.12
  4. Step 4: Simplify right side
    28,188x = 357,950,770.73
  5. Step 5: Solve for x
    x = 357,950,770.73/28,188
  6. Step 6: Final answer
    x = 12,698.69

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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.