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Finding the Fourth Proportional to 18,695.50, 28,043.28 and 7,608.22

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Solution

The fourth proportional to 18,695.50, 28,043.28 and 7,608.22 is: 11,412.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,695.50 : 28,043.28 = 7,608.22 : x
  2. Step 2: Convert to fraction form
    18,695.50/28,043.28 = 7,608.22/x
  3. Step 3: Cross multiply
    18,695.50x = 28,043.28 × 7,608.22
  4. Step 4: Simplify right side
    18,695.50x = 213,359,443.76
  5. Step 5: Solve for x
    x = 213,359,443.76/18,695.50
  6. Step 6: Final answer
    x = 11,412.34

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Double scale
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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.