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Finding the Fourth Proportional to 18,803.66, 28,200.87 and 7,713.52

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Solution

The fourth proportional to 18,803.66, 28,200.87 and 7,713.52 is: 11,568.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.66 : 28,200.87 = 7,713.52 : x
  2. Step 2: Convert to fraction form
    18,803.66/28,200.87 = 7,713.52/x
  3. Step 3: Cross multiply
    18,803.66x = 28,200.87 × 7,713.52
  4. Step 4: Simplify right side
    18,803.66x = 217,527,904.26
  5. Step 5: Solve for x
    x = 217,527,904.26/18,803.66
  6. Step 6: Final answer
    x = 11,568.38

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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.