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Finding the Fourth Proportional to 18,127.80, 27,191.70 and 17,107.20

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Solution

The fourth proportional to 18,127.80, 27,191.70 and 17,107.20 is: 25,660.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,127.80 : 27,191.70 = 17,107.20 : x
  2. Step 2: Convert to fraction form
    18,127.80/27,191.70 = 17,107.20/x
  3. Step 3: Cross multiply
    18,127.80x = 27,191.70 × 17,107.20
  4. Step 4: Simplify right side
    18,127.80x = 465,173,850.24
  5. Step 5: Solve for x
    x = 465,173,850.24/18,127.80
  6. Step 6: Final answer
    x = 25,660.80

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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.