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Finding the Fourth Proportional to 18,960.88, 28,419.17 and 14,265.80

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Solution

The fourth proportional to 18,960.88, 28,419.17 and 14,265.80 is: 21,382.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,960.88 : 28,419.17 = 14,265.80 : x
  2. Step 2: Convert to fraction form
    18,960.88/28,419.17 = 14,265.80/x
  3. Step 3: Cross multiply
    18,960.88x = 28,419.17 × 14,265.80
  4. Step 4: Simplify right side
    18,960.88x = 405,422,124.06
  5. Step 5: Solve for x
    x = 405,422,124.06/18,960.88
  6. Step 6: Final answer
    x = 21,382.04

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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.