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Finding the Fourth Proportional to 8,728.80, 13,093.12 and 3,180.20

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Solution

The fourth proportional to 8,728.80, 13,093.12 and 3,180.20 is: 4,770.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.80 : 13,093.12 = 3,180.20 : x
  2. Step 2: Convert to fraction form
    8,728.80/13,093.12 = 3,180.20/x
  3. Step 3: Cross multiply
    8,728.80x = 13,093.12 × 3,180.20
  4. Step 4: Simplify right side
    8,728.80x = 41,638,740.22
  5. Step 5: Solve for x
    x = 41,638,740.22/8,728.80
  6. Step 6: Final answer
    x = 4,770.27

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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.