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Finding the Fourth Proportional to 20,627.30, 30,940.92 and 7,479.64

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Solution

The fourth proportional to 20,627.30, 30,940.92 and 7,479.64 is: 11,219.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,627.30 : 30,940.92 = 7,479.64 : x
  2. Step 2: Convert to fraction form
    20,627.30/30,940.92 = 7,479.64/x
  3. Step 3: Cross multiply
    20,627.30x = 30,940.92 × 7,479.64
  4. Step 4: Simplify right side
    20,627.30x = 231,426,942.87
  5. Step 5: Solve for x
    x = 231,426,942.87/20,627.30
  6. Step 6: Final answer
    x = 11,219.45

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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.