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Finding the Fourth Proportional to 28,480.44, 42,714.09 and 8,485.86

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Solution

The fourth proportional to 28,480.44, 42,714.09 and 8,485.86 is: 12,726.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,480.44 : 42,714.09 = 8,485.86 : x
  2. Step 2: Convert to fraction form
    28,480.44/42,714.09 = 8,485.86/x
  3. Step 3: Cross multiply
    28,480.44x = 42,714.09 × 8,485.86
  4. Step 4: Simplify right side
    28,480.44x = 362,465,787.77
  5. Step 5: Solve for x
    x = 362,465,787.77/28,480.44
  6. Step 6: Final answer
    x = 12,726.83

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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.