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Finding the Fourth Proportional to 53,218.92, 79,785.09 and 19,920.33

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Solution

The fourth proportional to 53,218.92, 79,785.09 and 19,920.33 is: 29,864.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,218.92 : 79,785.09 = 19,920.33 : x
  2. Step 2: Convert to fraction form
    53,218.92/79,785.09 = 19,920.33/x
  3. Step 3: Cross multiply
    53,218.92x = 79,785.09 × 19,920.33
  4. Step 4: Simplify right side
    53,218.92x = 1,589,345,321.88
  5. Step 5: Solve for x
    x = 1,589,345,321.88/53,218.92
  6. Step 6: Final answer
    x = 29,864.29

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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.