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Finding the Fourth Proportional to 11,809.99, 17,710.43 and 4,412.87

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Solution

The fourth proportional to 11,809.99, 17,710.43 and 4,412.87 is: 6,617.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,809.99 : 17,710.43 = 4,412.87 : x
  2. Step 2: Convert to fraction form
    11,809.99/17,710.43 = 4,412.87/x
  3. Step 3: Cross multiply
    11,809.99x = 17,710.43 × 4,412.87
  4. Step 4: Simplify right side
    11,809.99x = 78,153,825.23
  5. Step 5: Solve for x
    x = 78,153,825.23/11,809.99
  6. Step 6: Final answer
    x = 6,617.60

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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.