Home / 20,872.32-31,313.28-6,832.80

Finding the Fourth Proportional to 20,872.32, 31,313.28 and 6,832.80

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Solution

The fourth proportional to 20,872.32, 31,313.28 and 6,832.80 is: 10,250.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.32 : 31,313.28 = 6,832.80 : x
  2. Step 2: Convert to fraction form
    20,872.32/31,313.28 = 6,832.80/x
  3. Step 3: Cross multiply
    20,872.32x = 31,313.28 × 6,832.80
  4. Step 4: Simplify right side
    20,872.32x = 213,957,379.58
  5. Step 5: Solve for x
    x = 213,957,379.58/20,872.32
  6. Step 6: Final answer
    x = 10,250.77

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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.