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Finding the Fourth Proportional to 17,078.80, 25,621.80 and 5,231.60

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Solution

The fourth proportional to 17,078.80, 25,621.80 and 5,231.60 is: 7,848.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,078.80 : 25,621.80 = 5,231.60 : x
  2. Step 2: Convert to fraction form
    17,078.80/25,621.80 = 5,231.60/x
  3. Step 3: Cross multiply
    17,078.80x = 25,621.80 × 5,231.60
  4. Step 4: Simplify right side
    17,078.80x = 134,043,008.88
  5. Step 5: Solve for x
    x = 134,043,008.88/17,078.80
  6. Step 6: Final answer
    x = 7,848.50

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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.