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Finding the Fourth Proportional to 18,803.42, 28,193.43 and 12,953.42

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Solution

The fourth proportional to 18,803.42, 28,193.43 and 12,953.42 is: 19,422.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.42 : 28,193.43 = 12,953.42 : x
  2. Step 2: Convert to fraction form
    18,803.42/28,193.43 = 12,953.42/x
  3. Step 3: Cross multiply
    18,803.42x = 28,193.43 × 12,953.42
  4. Step 4: Simplify right side
    18,803.42x = 365,201,340.03
  5. Step 5: Solve for x
    x = 365,201,340.03/18,803.42
  6. Step 6: Final answer
    x = 19,422.07

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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.