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Finding the Fourth Proportional to 18,695.56, 28,035.12 and 7,000.57

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Solution

The fourth proportional to 18,695.56, 28,035.12 and 7,000.57 is: 10,497.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,695.56 : 28,035.12 = 7,000.57 : x
  2. Step 2: Convert to fraction form
    18,695.56/28,035.12 = 7,000.57/x
  3. Step 3: Cross multiply
    18,695.56x = 28,035.12 × 7,000.57
  4. Step 4: Simplify right side
    18,695.56x = 196,261,820.02
  5. Step 5: Solve for x
    x = 196,261,820.02/18,695.56
  6. Step 6: Final answer
    x = 10,497.78

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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.