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Finding the Fourth Proportional to 11,532.80, 17,296.80 and 4,959.20

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Solution

The fourth proportional to 11,532.80, 17,296.80 and 4,959.20 is: 7,437.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,532.80 : 17,296.80 = 4,959.20 : x
  2. Step 2: Convert to fraction form
    11,532.80/17,296.80 = 4,959.20/x
  3. Step 3: Cross multiply
    11,532.80x = 17,296.80 × 4,959.20
  4. Step 4: Simplify right side
    11,532.80x = 85,778,290.56
  5. Step 5: Solve for x
    x = 85,778,290.56/11,532.80
  6. Step 6: Final answer
    x = 7,437.77

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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.