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Finding the Fourth Proportional to 7,879.92, 11,799.12 and 6,312.48

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Solution

The fourth proportional to 7,879.92, 11,799.12 and 6,312.48 is: 9,452.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.92 : 11,799.12 = 6,312.48 : x
  2. Step 2: Convert to fraction form
    7,879.92/11,799.12 = 6,312.48/x
  3. Step 3: Cross multiply
    7,879.92x = 11,799.12 × 6,312.48
  4. Step 4: Simplify right side
    7,879.92x = 74,481,709.02
  5. Step 5: Solve for x
    x = 74,481,709.02/7,879.92
  6. Step 6: Final answer
    x = 9,452.09

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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.