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Finding the Fourth Proportional to 28,102.92, 42,154.32 and 8,380.98

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Solution

The fourth proportional to 28,102.92, 42,154.32 and 8,380.98 is: 12,571.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,102.92 : 42,154.32 = 8,380.98 : x
  2. Step 2: Convert to fraction form
    28,102.92/42,154.32 = 8,380.98/x
  3. Step 3: Cross multiply
    28,102.92x = 42,154.32 × 8,380.98
  4. Step 4: Simplify right side
    28,102.92x = 353,294,512.83
  5. Step 5: Solve for x
    x = 353,294,512.83/28,102.92
  6. Step 6: Final answer
    x = 12,571.45

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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.