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Finding the Fourth Proportional to 28,099.92, 42,155.96 and 8,380.08

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Solution

The fourth proportional to 28,099.92, 42,155.96 and 8,380.08 is: 12,571.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,099.92 : 42,155.96 = 8,380.08 : x
  2. Step 2: Convert to fraction form
    28,099.92/42,155.96 = 8,380.08/x
  3. Step 3: Cross multiply
    28,099.92x = 42,155.96 × 8,380.08
  4. Step 4: Simplify right side
    28,099.92x = 353,270,317.28
  5. Step 5: Solve for x
    x = 353,270,317.28/28,099.92
  6. Step 6: Final answer
    x = 12,571.93

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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.