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Finding the Fourth Proportional to 19,296.28, 28,944.48 and 5,445.28

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Solution

The fourth proportional to 19,296.28, 28,944.48 and 5,445.28 is: 8,167.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,296.28 : 28,944.48 = 5,445.28 : x
  2. Step 2: Convert to fraction form
    19,296.28/28,944.48 = 5,445.28/x
  3. Step 3: Cross multiply
    19,296.28x = 28,944.48 × 5,445.28
  4. Step 4: Simplify right side
    19,296.28x = 157,610,798.05
  5. Step 5: Solve for x
    x = 157,610,798.05/19,296.28
  6. Step 6: Final answer
    x = 8,167.94

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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.