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Finding the Fourth Proportional to 20,630.64, 30,940.97 and 9,526.65

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Solution

The fourth proportional to 20,630.64, 30,940.97 and 9,526.65 is: 14,287.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.64 : 30,940.97 = 9,526.65 : x
  2. Step 2: Convert to fraction form
    20,630.64/30,940.97 = 9,526.65/x
  3. Step 3: Cross multiply
    20,630.64x = 30,940.97 × 9,526.65
  4. Step 4: Simplify right side
    20,630.64x = 294,763,791.85
  5. Step 5: Solve for x
    x = 294,763,791.85/20,630.64
  6. Step 6: Final answer
    x = 14,287.67

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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.