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Finding the Fourth Proportional to 18,906.25, 28,364.04 and 7,816.11

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Solution

The fourth proportional to 18,906.25, 28,364.04 and 7,816.11 is: 11,726.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,906.25 : 28,364.04 = 7,816.11 : x
  2. Step 2: Convert to fraction form
    18,906.25/28,364.04 = 7,816.11/x
  3. Step 3: Cross multiply
    18,906.25x = 28,364.04 × 7,816.11
  4. Step 4: Simplify right side
    18,906.25x = 221,696,275.78
  5. Step 5: Solve for x
    x = 221,696,275.78/18,906.25
  6. Step 6: Final answer
    x = 11,726.09

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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.