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Finding the Fourth Proportional to 8,984.20, 13,450.70 and 8,728.20

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Solution

The fourth proportional to 8,984.20, 13,450.70 and 8,728.20 is: 13,067.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,984.20 : 13,450.70 = 8,728.20 : x
  2. Step 2: Convert to fraction form
    8,984.20/13,450.70 = 8,728.20/x
  3. Step 3: Cross multiply
    8,984.20x = 13,450.70 × 8,728.20
  4. Step 4: Simplify right side
    8,984.20x = 117,400,399.74
  5. Step 5: Solve for x
    x = 117,400,399.74/8,984.20
  6. Step 6: Final answer
    x = 13,067.43

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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.