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Finding the Fourth Proportional to 17,043.80, 25,541.70 and 13,539.80

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Solution

The fourth proportional to 17,043.80, 25,541.70 and 13,539.80 is: 20,290.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,043.80 : 25,541.70 = 13,539.80 : x
  2. Step 2: Convert to fraction form
    17,043.80/25,541.70 = 13,539.80/x
  3. Step 3: Cross multiply
    17,043.80x = 25,541.70 × 13,539.80
  4. Step 4: Simplify right side
    17,043.80x = 345,829,509.66
  5. Step 5: Solve for x
    x = 345,829,509.66/17,043.80
  6. Step 6: Final answer
    x = 20,290.63

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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.