Home / 20,179.86-30,231.63-11,421.06

Finding the Fourth Proportional to 20,179.86, 30,231.63 and 11,421.06

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Solution

The fourth proportional to 20,179.86, 30,231.63 and 11,421.06 is: 17,109.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,179.86 : 30,231.63 = 11,421.06 : x
  2. Step 2: Convert to fraction form
    20,179.86/30,231.63 = 11,421.06/x
  3. Step 3: Cross multiply
    20,179.86x = 30,231.63 × 11,421.06
  4. Step 4: Simplify right side
    20,179.86x = 345,277,260.13
  5. Step 5: Solve for x
    x = 345,277,260.13/20,179.86
  6. Step 6: Final answer
    x = 17,109.99

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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.