Home / 13,809.82-20,714.62-3,421.56

Finding the Fourth Proportional to 13,809.82, 20,714.62 and 3,421.56

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Solution

The fourth proportional to 13,809.82, 20,714.62 and 3,421.56 is: 5,132.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,809.82 : 20,714.62 = 3,421.56 : x
  2. Step 2: Convert to fraction form
    13,809.82/20,714.62 = 3,421.56/x
  3. Step 3: Cross multiply
    13,809.82x = 20,714.62 × 3,421.56
  4. Step 4: Simplify right side
    13,809.82x = 70,876,315.21
  5. Step 5: Solve for x
    x = 70,876,315.21/13,809.82
  6. Step 6: Final answer
    x = 5,132.31

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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.