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Finding the Fourth Proportional to 21,863.88, 30,169.71 and 12,301.92

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Solution

The fourth proportional to 21,863.88, 30,169.71 and 12,301.92 is: 16,975.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,863.88 : 30,169.71 = 12,301.92 : x
  2. Step 2: Convert to fraction form
    21,863.88/30,169.71 = 12,301.92/x
  3. Step 3: Cross multiply
    21,863.88x = 30,169.71 × 12,301.92
  4. Step 4: Simplify right side
    21,863.88x = 371,145,358.84
  5. Step 5: Solve for x
    x = 371,145,358.84/21,863.88
  6. Step 6: Final answer
    x = 16,975.27

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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.