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Finding the Fourth Proportional to 19,011.60, 28,517.40 and 7,914.60

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Solution

The fourth proportional to 19,011.60, 28,517.40 and 7,914.60 is: 11,871.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,011.60 : 28,517.40 = 7,914.60 : x
  2. Step 2: Convert to fraction form
    19,011.60/28,517.40 = 7,914.60/x
  3. Step 3: Cross multiply
    19,011.60x = 28,517.40 × 7,914.60
  4. Step 4: Simplify right side
    19,011.60x = 225,703,814.04
  5. Step 5: Solve for x
    x = 225,703,814.04/19,011.60
  6. Step 6: Final answer
    x = 11,871.90

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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.