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Finding the Fourth Proportional to 8,544.80, 12,817.20 and 8,122.40

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Solution

The fourth proportional to 8,544.80, 12,817.20 and 8,122.40 is: 12,183.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,544.80 : 12,817.20 = 8,122.40 : x
  2. Step 2: Convert to fraction form
    8,544.80/12,817.20 = 8,122.40/x
  3. Step 3: Cross multiply
    8,544.80x = 12,817.20 × 8,122.40
  4. Step 4: Simplify right side
    8,544.80x = 104,106,425.28
  5. Step 5: Solve for x
    x = 104,106,425.28/8,544.80
  6. Step 6: Final answer
    x = 12,183.60

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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.