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Finding the Fourth Proportional to 13,362.58, 20,043.15 and 5,042.40

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Solution

The fourth proportional to 13,362.58, 20,043.15 and 5,042.40 is: 7,563.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,362.58 : 20,043.15 = 5,042.40 : x
  2. Step 2: Convert to fraction form
    13,362.58/20,043.15 = 5,042.40/x
  3. Step 3: Cross multiply
    13,362.58x = 20,043.15 × 5,042.40
  4. Step 4: Simplify right side
    13,362.58x = 101,065,485.49
  5. Step 5: Solve for x
    x = 101,065,485.49/13,362.58
  6. Step 6: Final answer
    x = 7,563.32

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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.