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Finding the Fourth Proportional to 7,775.28, 11,651.96 and 5,579.16

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Solution

The fourth proportional to 7,775.28, 11,651.96 and 5,579.16 is: 8,360.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,775.28 : 11,651.96 = 5,579.16 : x
  2. Step 2: Convert to fraction form
    7,775.28/11,651.96 = 5,579.16/x
  3. Step 3: Cross multiply
    7,775.28x = 11,651.96 × 5,579.16
  4. Step 4: Simplify right side
    7,775.28x = 65,008,149.15
  5. Step 5: Solve for x
    x = 65,008,149.15/7,775.28
  6. Step 6: Final answer
    x = 8,360.88

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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.