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Finding the Fourth Proportional to 18,799.72, 28,203.30 and 8,411.56

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Solution

The fourth proportional to 18,799.72, 28,203.30 and 8,411.56 is: 12,619.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,799.72 : 28,203.30 = 8,411.56 : x
  2. Step 2: Convert to fraction form
    18,799.72/28,203.30 = 8,411.56/x
  3. Step 3: Cross multiply
    18,799.72x = 28,203.30 × 8,411.56
  4. Step 4: Simplify right side
    18,799.72x = 237,233,750.15
  5. Step 5: Solve for x
    x = 237,233,750.15/18,799.72
  6. Step 6: Final answer
    x = 12,619.00

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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.