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Finding the Fourth Proportional to 21,951.56, 30,293.15 and 11,880

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Solution

The fourth proportional to 21,951.56, 30,293.15 and 11,880 is: 16,394.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,951.56 : 30,293.15 = 11,880 : x
  2. Step 2: Convert to fraction form
    21,951.56/30,293.15 = 11,880/x
  3. Step 3: Cross multiply
    21,951.56x = 30,293.15 × 11,880
  4. Step 4: Simplify right side
    21,951.56x = 359,882,562.60
  5. Step 5: Solve for x
    x = 359,882,562.60/21,951.56
  6. Step 6: Final answer
    x = 16,394.40

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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.