Home / 21,297.12-31,945.70-8,150.80

Finding the Fourth Proportional to 21,297.12, 31,945.70 and 8,150.80

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Solution

The fourth proportional to 21,297.12, 31,945.70 and 8,150.80 is: 12,226.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,297.12 : 31,945.70 = 8,150.80 : x
  2. Step 2: Convert to fraction form
    21,297.12/31,945.70 = 8,150.80/x
  3. Step 3: Cross multiply
    21,297.12x = 31,945.70 × 8,150.80
  4. Step 4: Simplify right side
    21,297.12x = 260,383,011.56
  5. Step 5: Solve for x
    x = 260,383,011.56/21,297.12
  6. Step 6: Final answer
    x = 12,226.21

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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.