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Finding the Fourth Proportional to 21,880.96, 30,195.92 and 12,448.96

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Solution

The fourth proportional to 21,880.96, 30,195.92 and 12,448.96 is: 17,179.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,880.96 : 30,195.92 = 12,448.96 : x
  2. Step 2: Convert to fraction form
    21,880.96/30,195.92 = 12,448.96/x
  3. Step 3: Cross multiply
    21,880.96x = 30,195.92 × 12,448.96
  4. Step 4: Simplify right side
    21,880.96x = 375,907,800.24
  5. Step 5: Solve for x
    x = 375,907,800.24/21,880.96
  6. Step 6: Final answer
    x = 17,179.68

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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.