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Finding the Fourth Proportional to 16,915.80, 25,376.48 and 5,819.80

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Solution

The fourth proportional to 16,915.80, 25,376.48 and 5,819.80 is: 8,730.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,915.80 : 25,376.48 = 5,819.80 : x
  2. Step 2: Convert to fraction form
    16,915.80/25,376.48 = 5,819.80/x
  3. Step 3: Cross multiply
    16,915.80x = 25,376.48 × 5,819.80
  4. Step 4: Simplify right side
    16,915.80x = 147,686,038.30
  5. Step 5: Solve for x
    x = 147,686,038.30/16,915.80
  6. Step 6: Final answer
    x = 8,730.66

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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.