Home / 20,967.82-28,939.68-12,021.30

Finding the Fourth Proportional to 20,967.82, 28,939.68 and 12,021.30

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Solution

The fourth proportional to 20,967.82, 28,939.68 and 12,021.30 is: 16,591.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,967.82 : 28,939.68 = 12,021.30 : x
  2. Step 2: Convert to fraction form
    20,967.82/28,939.68 = 12,021.30/x
  3. Step 3: Cross multiply
    20,967.82x = 28,939.68 × 12,021.30
  4. Step 4: Simplify right side
    20,967.82x = 347,892,575.18
  5. Step 5: Solve for x
    x = 347,892,575.18/20,967.82
  6. Step 6: Final answer
    x = 16,591.74

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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.