Home / 20,736.21-31,104.32-6,885.21

Finding the Fourth Proportional to 20,736.21, 31,104.32 and 6,885.21

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Solution

The fourth proportional to 20,736.21, 31,104.32 and 6,885.21 is: 10,327.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736.21 : 31,104.32 = 6,885.21 : x
  2. Step 2: Convert to fraction form
    20,736.21/31,104.32 = 6,885.21/x
  3. Step 3: Cross multiply
    20,736.21x = 31,104.32 × 6,885.21
  4. Step 4: Simplify right side
    20,736.21x = 214,159,740.68
  5. Step 5: Solve for x
    x = 214,159,740.68/20,736.21
  6. Step 6: Final answer
    x = 10,327.82

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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.