Home / 20,720.34-31,067.55-13,786.74

Finding the Fourth Proportional to 20,720.34, 31,067.55 and 13,786.74

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Solution

The fourth proportional to 20,720.34, 31,067.55 and 13,786.74 is: 20,671.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.34 : 31,067.55 = 13,786.74 : x
  2. Step 2: Convert to fraction form
    20,720.34/31,067.55 = 13,786.74/x
  3. Step 3: Cross multiply
    20,720.34x = 31,067.55 × 13,786.74
  4. Step 4: Simplify right side
    20,720.34x = 428,320,234.29
  5. Step 5: Solve for x
    x = 428,320,234.29/20,720.34
  6. Step 6: Final answer
    x = 20,671.49

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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.