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Finding the Fourth Proportional to 18,698.80, 28,015.80 and 16,106.80

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Solution

The fourth proportional to 18,698.80, 28,015.80 and 16,106.80 is: 24,132.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.80 : 28,015.80 = 16,106.80 : x
  2. Step 2: Convert to fraction form
    18,698.80/28,015.80 = 16,106.80/x
  3. Step 3: Cross multiply
    18,698.80x = 28,015.80 × 16,106.80
  4. Step 4: Simplify right side
    18,698.80x = 451,244,887.44
  5. Step 5: Solve for x
    x = 451,244,887.44/18,698.80
  6. Step 6: Final answer
    x = 24,132.29

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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.