Home / 31,556.88-43,546.68-18,979.20

Finding the Fourth Proportional to 31,556.88, 43,546.68 and 18,979.20

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Solution

The fourth proportional to 31,556.88, 43,546.68 and 18,979.20 is: 26,190.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,556.88 : 43,546.68 = 18,979.20 : x
  2. Step 2: Convert to fraction form
    31,556.88/43,546.68 = 18,979.20/x
  3. Step 3: Cross multiply
    31,556.88x = 43,546.68 × 18,979.20
  4. Step 4: Simplify right side
    31,556.88x = 826,481,149.06
  5. Step 5: Solve for x
    x = 826,481,149.06/31,556.88
  6. Step 6: Final answer
    x = 26,190.20

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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.