Home / 20,021.13-30,031.68-8,180.49

Finding the Fourth Proportional to 20,021.13, 30,031.68 and 8,180.49

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Solution

The fourth proportional to 20,021.13, 30,031.68 and 8,180.49 is: 12,270.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,021.13 : 30,031.68 = 8,180.49 : x
  2. Step 2: Convert to fraction form
    20,021.13/30,031.68 = 8,180.49/x
  3. Step 3: Cross multiply
    20,021.13x = 30,031.68 × 8,180.49
  4. Step 4: Simplify right side
    20,021.13x = 245,673,857.92
  5. Step 5: Solve for x
    x = 245,673,857.92/20,021.13
  6. Step 6: Final answer
    x = 12,270.73

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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.