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Finding the Fourth Proportional to 20,609.01, 30,892.68 and 8,124.21

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Solution

The fourth proportional to 20,609.01, 30,892.68 and 8,124.21 is: 12,178.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,609.01 : 30,892.68 = 8,124.21 : x
  2. Step 2: Convert to fraction form
    20,609.01/30,892.68 = 8,124.21/x
  3. Step 3: Cross multiply
    20,609.01x = 30,892.68 × 8,124.21
  4. Step 4: Simplify right side
    20,609.01x = 250,978,619.78
  5. Step 5: Solve for x
    x = 250,978,619.78/20,609.01
  6. Step 6: Final answer
    x = 12,178.10

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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.