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Finding the Fourth Proportional to 19,011.19, 28,521.64 and 7,914.19

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Solution

The fourth proportional to 19,011.19, 28,521.64 and 7,914.19 is: 11,873.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,011.19 : 28,521.64 = 7,914.19 : x
  2. Step 2: Convert to fraction form
    19,011.19/28,521.64 = 7,914.19/x
  3. Step 3: Cross multiply
    19,011.19x = 28,521.64 × 7,914.19
  4. Step 4: Simplify right side
    19,011.19x = 225,725,678.07
  5. Step 5: Solve for x
    x = 225,725,678.07/19,011.19
  6. Step 6: Final answer
    x = 11,873.31

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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.