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Finding the Fourth Proportional to 13,591.74, 18,757.80 and 7,623.36

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Solution

The fourth proportional to 13,591.74, 18,757.80 and 7,623.36 is: 10,520.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,591.74 : 18,757.80 = 7,623.36 : x
  2. Step 2: Convert to fraction form
    13,591.74/18,757.80 = 7,623.36/x
  3. Step 3: Cross multiply
    13,591.74x = 18,757.80 × 7,623.36
  4. Step 4: Simplify right side
    13,591.74x = 142,997,462.21
  5. Step 5: Solve for x
    x = 142,997,462.21/13,591.74
  6. Step 6: Final answer
    x = 10,520.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.