Home / 19,919.39-29,879.44-5,128.61

Finding the Fourth Proportional to 19,919.39, 29,879.44 and 5,128.61

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Solution

The fourth proportional to 19,919.39, 29,879.44 and 5,128.61 is: 7,693.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,919.39 : 29,879.44 = 5,128.61 : x
  2. Step 2: Convert to fraction form
    19,919.39/29,879.44 = 5,128.61/x
  3. Step 3: Cross multiply
    19,919.39x = 29,879.44 × 5,128.61
  4. Step 4: Simplify right side
    19,919.39x = 153,239,832.56
  5. Step 5: Solve for x
    x = 153,239,832.56/19,919.39
  6. Step 6: Final answer
    x = 7,693.00

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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.