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Finding the Fourth Proportional to 20,342.10, 30,520.65 and 8,497.11

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Solution

The fourth proportional to 20,342.10, 30,520.65 and 8,497.11 is: 12,748.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.10 : 30,520.65 = 8,497.11 : x
  2. Step 2: Convert to fraction form
    20,342.10/30,520.65 = 8,497.11/x
  3. Step 3: Cross multiply
    20,342.10x = 30,520.65 × 8,497.11
  4. Step 4: Simplify right side
    20,342.10x = 259,337,320.32
  5. Step 5: Solve for x
    x = 259,337,320.32/20,342.10
  6. Step 6: Final answer
    x = 12,748.80

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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.