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Finding the Fourth Proportional to 16,916.80, 25,375.20 and 8,622.40

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Solution

The fourth proportional to 16,916.80, 25,375.20 and 8,622.40 is: 12,933.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,916.80 : 25,375.20 = 8,622.40 : x
  2. Step 2: Convert to fraction form
    16,916.80/25,375.20 = 8,622.40/x
  3. Step 3: Cross multiply
    16,916.80x = 25,375.20 × 8,622.40
  4. Step 4: Simplify right side
    16,916.80x = 218,795,124.48
  5. Step 5: Solve for x
    x = 218,795,124.48/16,916.80
  6. Step 6: Final answer
    x = 12,933.60

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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.