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Finding the Fourth Proportional to 28,379.40, 42,573.60 and 8,653.44

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Solution

The fourth proportional to 28,379.40, 42,573.60 and 8,653.44 is: 12,981.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,379.40 : 42,573.60 = 8,653.44 : x
  2. Step 2: Convert to fraction form
    28,379.40/42,573.60 = 8,653.44/x
  3. Step 3: Cross multiply
    28,379.40x = 42,573.60 × 8,653.44
  4. Step 4: Simplify right side
    28,379.40x = 368,408,093.18
  5. Step 5: Solve for x
    x = 368,408,093.18/28,379.40
  6. Step 6: Final answer
    x = 12,981.53

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Why These Related Problems?

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