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Finding the Fourth Proportional to 28,076.92, 42,115.34 and 8,355.44

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Solution

The fourth proportional to 28,076.92, 42,115.34 and 8,355.44 is: 12,533.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,076.92 : 42,115.34 = 8,355.44 : x
  2. Step 2: Convert to fraction form
    28,076.92/42,115.34 = 8,355.44/x
  3. Step 3: Cross multiply
    28,076.92x = 42,115.34 × 8,355.44
  4. Step 4: Simplify right side
    28,076.92x = 351,892,196.45
  5. Step 5: Solve for x
    x = 351,892,196.45/28,076.92
  6. Step 6: Final answer
    x = 12,533.15

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1.5x scale

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.