Home / 21,195.96-31,778.58-12,429.24

Finding the Fourth Proportional to 21,195.96, 31,778.58 and 12,429.24

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Solution

The fourth proportional to 21,195.96, 31,778.58 and 12,429.24 is: 18,634.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195.96 : 31,778.58 = 12,429.24 : x
  2. Step 2: Convert to fraction form
    21,195.96/31,778.58 = 12,429.24/x
  3. Step 3: Cross multiply
    21,195.96x = 31,778.58 × 12,429.24
  4. Step 4: Simplify right side
    21,195.96x = 394,983,597.68
  5. Step 5: Solve for x
    x = 394,983,597.68/21,195.96
  6. Step 6: Final answer
    x = 18,634.85

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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.