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Finding the Fourth Proportional to 20,335.72, 30,520.22 and 8,662.12

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Solution

The fourth proportional to 20,335.72, 30,520.22 and 8,662.12 is: 13,000.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,335.72 : 30,520.22 = 8,662.12 : x
  2. Step 2: Convert to fraction form
    20,335.72/30,520.22 = 8,662.12/x
  3. Step 3: Cross multiply
    20,335.72x = 30,520.22 × 8,662.12
  4. Step 4: Simplify right side
    20,335.72x = 264,369,808.07
  5. Step 5: Solve for x
    x = 264,369,808.07/20,335.72
  6. Step 6: Final answer
    x = 13,000.27

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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.