Home / 20,072.15-30,126.90-10,218.80

Finding the Fourth Proportional to 20,072.15, 30,126.90 and 10,218.80

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Solution

The fourth proportional to 20,072.15, 30,126.90 and 10,218.80 is: 15,337.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,072.15 : 30,126.90 = 10,218.80 : x
  2. Step 2: Convert to fraction form
    20,072.15/30,126.90 = 10,218.80/x
  3. Step 3: Cross multiply
    20,072.15x = 30,126.90 × 10,218.80
  4. Step 4: Simplify right side
    20,072.15x = 307,860,765.72
  5. Step 5: Solve for x
    x = 307,860,765.72/20,072.15
  6. Step 6: Final answer
    x = 15,337.71

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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.