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Finding the Fourth Proportional to 9,879.60, 14,819.40 and 8,324.40

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Solution

The fourth proportional to 9,879.60, 14,819.40 and 8,324.40 is: 12,486.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,879.60 : 14,819.40 = 8,324.40 : x
  2. Step 2: Convert to fraction form
    9,879.60/14,819.40 = 8,324.40/x
  3. Step 3: Cross multiply
    9,879.60x = 14,819.40 × 8,324.40
  4. Step 4: Simplify right side
    9,879.60x = 123,362,613.36
  5. Step 5: Solve for x
    x = 123,362,613.36/9,879.60
  6. Step 6: Final answer
    x = 12,486.60

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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.