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Finding the Fourth Proportional to 21,951.87, 30,293.49 and 11,880.33

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Solution

The fourth proportional to 21,951.87, 30,293.49 and 11,880.33 is: 16,394.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,951.87 : 30,293.49 = 11,880.33 : x
  2. Step 2: Convert to fraction form
    21,951.87/30,293.49 = 11,880.33/x
  3. Step 3: Cross multiply
    21,951.87x = 30,293.49 × 11,880.33
  4. Step 4: Simplify right side
    21,951.87x = 359,896,658.05
  5. Step 5: Solve for x
    x = 359,896,658.05/21,951.87
  6. Step 6: Final answer
    x = 16,394.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.