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Finding the Fourth Proportional to 28,193.58, 42,295.95 and 12,611.34

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Solution

The fourth proportional to 28,193.58, 42,295.95 and 12,611.34 is: 18,919.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,193.58 : 42,295.95 = 12,611.34 : x
  2. Step 2: Convert to fraction form
    28,193.58/42,295.95 = 12,611.34/x
  3. Step 3: Cross multiply
    28,193.58x = 42,295.95 × 12,611.34
  4. Step 4: Simplify right side
    28,193.58x = 533,408,606.07
  5. Step 5: Solve for x
    x = 533,408,606.07/28,193.58
  6. Step 6: Final answer
    x = 18,919.51

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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.