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Finding the Fourth Proportional to 19,186.56, 28,783.12 and 8,799.20

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Solution

The fourth proportional to 19,186.56, 28,783.12 and 8,799.20 is: 13,200.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,186.56 : 28,783.12 = 8,799.20 : x
  2. Step 2: Convert to fraction form
    19,186.56/28,783.12 = 8,799.20/x
  3. Step 3: Cross multiply
    19,186.56x = 28,783.12 × 8,799.20
  4. Step 4: Simplify right side
    19,186.56x = 253,268,429.50
  5. Step 5: Solve for x
    x = 253,268,429.50/19,186.56
  6. Step 6: Final answer
    x = 13,200.30

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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.