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Finding the Fourth Proportional to 20,636.58, 30,932.70 and 13,518.09

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Solution

The fourth proportional to 20,636.58, 30,932.70 and 13,518.09 is: 20,262.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,636.58 : 30,932.70 = 13,518.09 : x
  2. Step 2: Convert to fraction form
    20,636.58/30,932.70 = 13,518.09/x
  3. Step 3: Cross multiply
    20,636.58x = 30,932.70 × 13,518.09
  4. Step 4: Simplify right side
    20,636.58x = 418,151,022.54
  5. Step 5: Solve for x
    x = 418,151,022.54/20,636.58
  6. Step 6: Final answer
    x = 20,262.61

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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.