Home / 19,728.96-27,231.12-12,181.80

Finding the Fourth Proportional to 19,728.96, 27,231.12 and 12,181.80

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Solution

The fourth proportional to 19,728.96, 27,231.12 and 12,181.80 is: 16,814.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,728.96 : 27,231.12 = 12,181.80 : x
  2. Step 2: Convert to fraction form
    19,728.96/27,231.12 = 12,181.80/x
  3. Step 3: Cross multiply
    19,728.96x = 27,231.12 × 12,181.80
  4. Step 4: Simplify right side
    19,728.96x = 331,724,057.62
  5. Step 5: Solve for x
    x = 331,724,057.62/19,728.96
  6. Step 6: Final answer
    x = 16,814.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.