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Finding the Fourth Proportional to 20,694.70, 31,005.60 and 16,976.80

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Solution

The fourth proportional to 20,694.70, 31,005.60 and 16,976.80 is: 25,435.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,694.70 : 31,005.60 = 16,976.80 : x
  2. Step 2: Convert to fraction form
    20,694.70/31,005.60 = 16,976.80/x
  3. Step 3: Cross multiply
    20,694.70x = 31,005.60 × 16,976.80
  4. Step 4: Simplify right side
    20,694.70x = 526,375,870.08
  5. Step 5: Solve for x
    x = 526,375,870.08/20,694.70
  6. Step 6: Final answer
    x = 25,435.30

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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.