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Finding the Fourth Proportional to 18,850.80, 28,297.80 and 10,081.20

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Solution

The fourth proportional to 18,850.80, 28,297.80 and 10,081.20 is: 15,133.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,850.80 : 28,297.80 = 10,081.20 : x
  2. Step 2: Convert to fraction form
    18,850.80/28,297.80 = 10,081.20/x
  3. Step 3: Cross multiply
    18,850.80x = 28,297.80 × 10,081.20
  4. Step 4: Simplify right side
    18,850.80x = 285,275,781.36
  5. Step 5: Solve for x
    x = 285,275,781.36/18,850.80
  6. Step 6: Final answer
    x = 15,133.35

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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.