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Finding the Fourth Proportional to 7,879.40, 11,819.10 and 4,416.20

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Solution

The fourth proportional to 7,879.40, 11,819.10 and 4,416.20 is: 6,624.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.40 : 11,819.10 = 4,416.20 : x
  2. Step 2: Convert to fraction form
    7,879.40/11,819.10 = 4,416.20/x
  3. Step 3: Cross multiply
    7,879.40x = 11,819.10 × 4,416.20
  4. Step 4: Simplify right side
    7,879.40x = 52,195,509.42
  5. Step 5: Solve for x
    x = 52,195,509.42/7,879.40
  6. Step 6: Final answer
    x = 6,624.30

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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.