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Finding the Fourth Proportional to 11,879.60, 16,393.21 and 7,099.65

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Solution

The fourth proportional to 11,879.60, 16,393.21 and 7,099.65 is: 9,797.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,879.60 : 16,393.21 = 7,099.65 : x
  2. Step 2: Convert to fraction form
    11,879.60/16,393.21 = 7,099.65/x
  3. Step 3: Cross multiply
    11,879.60x = 16,393.21 × 7,099.65
  4. Step 4: Simplify right side
    11,879.60x = 116,386,035.63
  5. Step 5: Solve for x
    x = 116,386,035.63/11,879.60
  6. Step 6: Final answer
    x = 9,797.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.