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Finding the Fourth Proportional to 12,542.69, 18,843.20 and 7,352.21

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Solution

The fourth proportional to 12,542.69, 18,843.20 and 7,352.21 is: 11,045.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,542.69 : 18,843.20 = 7,352.21 : x
  2. Step 2: Convert to fraction form
    12,542.69/18,843.20 = 7,352.21/x
  3. Step 3: Cross multiply
    12,542.69x = 18,843.20 × 7,352.21
  4. Step 4: Simplify right side
    12,542.69x = 138,539,163.47
  5. Step 5: Solve for x
    x = 138,539,163.47/12,542.69
  6. Step 6: Final answer
    x = 11,045.41

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1.5x scale

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.