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Finding the Fourth Proportional to 7,919.19, 11,873.99 and 5,451.30

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Solution

The fourth proportional to 7,919.19, 11,873.99 and 5,451.30 is: 8,173.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.19 : 11,873.99 = 5,451.30 : x
  2. Step 2: Convert to fraction form
    7,919.19/11,873.99 = 5,451.30/x
  3. Step 3: Cross multiply
    7,919.19x = 11,873.99 × 5,451.30
  4. Step 4: Simplify right side
    7,919.19x = 64,728,654.43
  5. Step 5: Solve for x
    x = 64,728,654.43/7,919.19
  6. Step 6: Final answer
    x = 8,173.65

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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.