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Finding the Fourth Proportional to 16,982.80, 25,477.80 and 5,135.60

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Solution

The fourth proportional to 16,982.80, 25,477.80 and 5,135.60 is: 7,704.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,982.80 : 25,477.80 = 5,135.60 : x
  2. Step 2: Convert to fraction form
    16,982.80/25,477.80 = 5,135.60/x
  3. Step 3: Cross multiply
    16,982.80x = 25,477.80 × 5,135.60
  4. Step 4: Simplify right side
    16,982.80x = 130,843,789.68
  5. Step 5: Solve for x
    x = 130,843,789.68/16,982.80
  6. Step 6: Final answer
    x = 7,704.49

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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.