Home / 31,579.21-43,593.48-20,830.42

Finding the Fourth Proportional to 31,579.21, 43,593.48 and 20,830.42

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Solution

The fourth proportional to 31,579.21, 43,593.48 and 20,830.42 is: 28,755.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,579.21 : 43,593.48 = 20,830.42 : x
  2. Step 2: Convert to fraction form
    31,579.21/43,593.48 = 20,830.42/x
  3. Step 3: Cross multiply
    31,579.21x = 43,593.48 × 20,830.42
  4. Step 4: Simplify right side
    31,579.21x = 908,070,497.66
  5. Step 5: Solve for x
    x = 908,070,497.66/31,579.21
  6. Step 6: Final answer
    x = 28,755.33

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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.