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Finding the Fourth Proportional to 18,469.90, 27,709.80 and 5,323.42

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Solution

The fourth proportional to 18,469.90, 27,709.80 and 5,323.42 is: 7,986.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,469.90 : 27,709.80 = 5,323.42 : x
  2. Step 2: Convert to fraction form
    18,469.90/27,709.80 = 5,323.42/x
  3. Step 3: Cross multiply
    18,469.90x = 27,709.80 × 5,323.42
  4. Step 4: Simplify right side
    18,469.90x = 147,510,903.52
  5. Step 5: Solve for x
    x = 147,510,903.52/18,469.90
  6. Step 6: Final answer
    x = 7,986.56

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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.