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Finding the Fourth Proportional to 7,218.99, 10,821.99 and 2,600.91

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Solution

The fourth proportional to 7,218.99, 10,821.99 and 2,600.91 is: 3,899.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,218.99 : 10,821.99 = 2,600.91 : x
  2. Step 2: Convert to fraction form
    7,218.99/10,821.99 = 2,600.91/x
  3. Step 3: Cross multiply
    7,218.99x = 10,821.99 × 2,600.91
  4. Step 4: Simplify right side
    7,218.99x = 28,147,022.01
  5. Step 5: Solve for x
    x = 28,147,022.01/7,218.99
  6. Step 6: Final answer
    x = 3,899.02

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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.