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Finding the Fourth Proportional to 9,919.70, 14,879.60 and 3,345.94

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Solution

The fourth proportional to 9,919.70, 14,879.60 and 3,345.94 is: 5,018.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,919.70 : 14,879.60 = 3,345.94 : x
  2. Step 2: Convert to fraction form
    9,919.70/14,879.60 = 3,345.94/x
  3. Step 3: Cross multiply
    9,919.70x = 14,879.60 × 3,345.94
  4. Step 4: Simplify right side
    9,919.70x = 49,786,232.09
  5. Step 5: Solve for x
    x = 49,786,232.09/9,919.70
  6. Step 6: Final answer
    x = 5,018.93

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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.