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Finding the Fourth Proportional to 13,800.52, 20,701.44 and 3,940.48

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Solution

The fourth proportional to 13,800.52, 20,701.44 and 3,940.48 is: 5,910.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,800.52 : 20,701.44 = 3,940.48 : x
  2. Step 2: Convert to fraction form
    13,800.52/20,701.44 = 3,940.48/x
  3. Step 3: Cross multiply
    13,800.52x = 20,701.44 × 3,940.48
  4. Step 4: Simplify right side
    13,800.52x = 81,573,610.29
  5. Step 5: Solve for x
    x = 81,573,610.29/13,800.52
  6. Step 6: Final answer
    x = 5,910.91

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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.