Home / 20,421.38-30,632.09-8,109.38

Finding the Fourth Proportional to 20,421.38, 30,632.09 and 8,109.38

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Solution

The fourth proportional to 20,421.38, 30,632.09 and 8,109.38 is: 12,164.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.38 : 30,632.09 = 8,109.38 : x
  2. Step 2: Convert to fraction form
    20,421.38/30,632.09 = 8,109.38/x
  3. Step 3: Cross multiply
    20,421.38x = 30,632.09 × 8,109.38
  4. Step 4: Simplify right side
    20,421.38x = 248,407,064.30
  5. Step 5: Solve for x
    x = 248,407,064.30/20,421.38
  6. Step 6: Final answer
    x = 12,164.07

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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.