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Finding the Fourth Proportional to 7,324.64, 10,997.90 and 7,215.30

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Solution

The fourth proportional to 7,324.64, 10,997.90 and 7,215.30 is: 10,833.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,324.64 : 10,997.90 = 7,215.30 : x
  2. Step 2: Convert to fraction form
    7,324.64/10,997.90 = 7,215.30/x
  3. Step 3: Cross multiply
    7,324.64x = 10,997.90 × 7,215.30
  4. Step 4: Simplify right side
    7,324.64x = 79,353,147.87
  5. Step 5: Solve for x
    x = 79,353,147.87/7,324.64
  6. Step 6: Final answer
    x = 10,833.73

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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.