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Finding the Fourth Proportional to 13,755.73, 20,629.43 and 5,320.73

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Solution

The fourth proportional to 13,755.73, 20,629.43 and 5,320.73 is: 7,979.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,755.73 : 20,629.43 = 5,320.73 : x
  2. Step 2: Convert to fraction form
    13,755.73/20,629.43 = 5,320.73/x
  3. Step 3: Cross multiply
    13,755.73x = 20,629.43 × 5,320.73
  4. Step 4: Simplify right side
    13,755.73x = 109,763,497.33
  5. Step 5: Solve for x
    x = 109,763,497.33/13,755.73
  6. Step 6: Final answer
    x = 7,979.47

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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.