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Finding the Fourth Proportional to 9,100.80, 12,571.20 and 8,841.60

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Solution

The fourth proportional to 9,100.80, 12,571.20 and 8,841.60 is: 12,213.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,100.80 : 12,571.20 = 8,841.60 : x
  2. Step 2: Convert to fraction form
    9,100.80/12,571.20 = 8,841.60/x
  3. Step 3: Cross multiply
    9,100.80x = 12,571.20 × 8,841.60
  4. Step 4: Simplify right side
    9,100.80x = 111,149,521.92
  5. Step 5: Solve for x
    x = 111,149,521.92/9,100.80
  6. Step 6: Final answer
    x = 12,213.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.