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Finding the Fourth Proportional to 19,074.60, 28,611.90 and 7,977.60

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Solution

The fourth proportional to 19,074.60, 28,611.90 and 7,977.60 is: 11,966.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,074.60 : 28,611.90 = 7,977.60 : x
  2. Step 2: Convert to fraction form
    19,074.60/28,611.90 = 7,977.60/x
  3. Step 3: Cross multiply
    19,074.60x = 28,611.90 × 7,977.60
  4. Step 4: Simplify right side
    19,074.60x = 228,254,293.44
  5. Step 5: Solve for x
    x = 228,254,293.44/19,074.60
  6. Step 6: Final answer
    x = 11,966.40

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Similar ratio
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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.