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Finding the Fourth Proportional to 16,428.20, 24,645.90 and 8,112.20

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Solution

The fourth proportional to 16,428.20, 24,645.90 and 8,112.20 is: 12,170.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,428.20 : 24,645.90 = 8,112.20 : x
  2. Step 2: Convert to fraction form
    16,428.20/24,645.90 = 8,112.20/x
  3. Step 3: Cross multiply
    16,428.20x = 24,645.90 × 8,112.20
  4. Step 4: Simplify right side
    16,428.20x = 199,932,469.98
  5. Step 5: Solve for x
    x = 199,932,469.98/16,428.20
  6. Step 6: Final answer
    x = 12,170.08

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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.