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Finding the Fourth Proportional to 7,290.80, 10,936.76 and 2,611.80

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Solution

The fourth proportional to 7,290.80, 10,936.76 and 2,611.80 is: 3,917.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,290.80 : 10,936.76 = 2,611.80 : x
  2. Step 2: Convert to fraction form
    7,290.80/10,936.76 = 2,611.80/x
  3. Step 3: Cross multiply
    7,290.80x = 10,936.76 × 2,611.80
  4. Step 4: Simplify right side
    7,290.80x = 28,564,629.77
  5. Step 5: Solve for x
    x = 28,564,629.77/7,290.80
  6. Step 6: Final answer
    x = 3,917.90

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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.