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Finding the Fourth Proportional to 7,287.99, 10,936.79 and 3,128.85

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Solution

The fourth proportional to 7,287.99, 10,936.79 and 3,128.85 is: 4,695.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,287.99 : 10,936.79 = 3,128.85 : x
  2. Step 2: Convert to fraction form
    7,287.99/10,936.79 = 3,128.85/x
  3. Step 3: Cross multiply
    7,287.99x = 10,936.79 × 3,128.85
  4. Step 4: Simplify right side
    7,287.99x = 34,219,559.75
  5. Step 5: Solve for x
    x = 34,219,559.75/7,287.99
  6. Step 6: Final answer
    x = 4,695.34

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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.