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Finding the Fourth Proportional to 22,043.67, 30,420.99 and 13,542.99

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Solution

The fourth proportional to 22,043.67, 30,420.99 and 13,542.99 is: 18,689.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,043.67 : 30,420.99 = 13,542.99 : x
  2. Step 2: Convert to fraction form
    22,043.67/30,420.99 = 13,542.99/x
  3. Step 3: Cross multiply
    22,043.67x = 30,420.99 × 13,542.99
  4. Step 4: Simplify right side
    22,043.67x = 411,991,163.36
  5. Step 5: Solve for x
    x = 411,991,163.36/22,043.67
  6. Step 6: Final answer
    x = 18,689.77

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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.