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Finding the Fourth Proportional to 7,496.80, 11,245.20 and 3,122.80

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Solution

The fourth proportional to 7,496.80, 11,245.20 and 3,122.80 is: 4,684.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,496.80 : 11,245.20 = 3,122.80 : x
  2. Step 2: Convert to fraction form
    7,496.80/11,245.20 = 3,122.80/x
  3. Step 3: Cross multiply
    7,496.80x = 11,245.20 × 3,122.80
  4. Step 4: Simplify right side
    7,496.80x = 35,116,510.56
  5. Step 5: Solve for x
    x = 35,116,510.56/7,496.80
  6. Step 6: Final answer
    x = 4,684.20

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Half scale
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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.