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Finding the Fourth Proportional to 28,114.41, 42,178.94 and 8,392.98

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Solution

The fourth proportional to 28,114.41, 42,178.94 and 8,392.98 is: 12,591.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,114.41 : 42,178.94 = 8,392.98 : x
  2. Step 2: Convert to fraction form
    28,114.41/42,178.94 = 8,392.98/x
  3. Step 3: Cross multiply
    28,114.41x = 42,178.94 × 8,392.98
  4. Step 4: Simplify right side
    28,114.41x = 354,006,999.84
  5. Step 5: Solve for x
    x = 354,006,999.84/28,114.41
  6. Step 6: Final answer
    x = 12,591.66

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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.