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Finding the Fourth Proportional to 9,222.80, 12,728.22 and 5,245.16

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Solution

The fourth proportional to 9,222.80, 12,728.22 and 5,245.16 is: 7,238.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,222.80 : 12,728.22 = 5,245.16 : x
  2. Step 2: Convert to fraction form
    9,222.80/12,728.22 = 5,245.16/x
  3. Step 3: Cross multiply
    9,222.80x = 12,728.22 × 5,245.16
  4. Step 4: Simplify right side
    9,222.80x = 66,761,550.42
  5. Step 5: Solve for x
    x = 66,761,550.42/9,222.80
  6. Step 6: Final answer
    x = 7,238.75

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Double scale
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Similar ratio
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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.