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Finding the Fourth Proportional to 20,284.99, 30,405.92 and 11,968.92

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Solution

The fourth proportional to 20,284.99, 30,405.92 and 11,968.92 is: 17,940.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,284.99 : 30,405.92 = 11,968.92 : x
  2. Step 2: Convert to fraction form
    20,284.99/30,405.92 = 11,968.92/x
  3. Step 3: Cross multiply
    20,284.99x = 30,405.92 × 11,968.92
  4. Step 4: Simplify right side
    20,284.99x = 363,925,964.16
  5. Step 5: Solve for x
    x = 363,925,964.16/20,284.99
  6. Step 6: Final answer
    x = 17,940.66

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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.