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Finding the Fourth Proportional to 7,908.20, 11,879.90 and 6,612.20

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Solution

The fourth proportional to 7,908.20, 11,879.90 and 6,612.20 is: 9,933.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,908.20 : 11,879.90 = 6,612.20 : x
  2. Step 2: Convert to fraction form
    7,908.20/11,879.90 = 6,612.20/x
  3. Step 3: Cross multiply
    7,908.20x = 11,879.90 × 6,612.20
  4. Step 4: Simplify right side
    7,908.20x = 78,552,274.78
  5. Step 5: Solve for x
    x = 78,552,274.78/7,908.20
  6. Step 6: Final answer
    x = 9,933.02

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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.