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Finding the Fourth Proportional to 18,231.80, 27,363.90 and 15,769.40

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Solution

The fourth proportional to 18,231.80, 27,363.90 and 15,769.40 is: 23,668.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,231.80 : 27,363.90 = 15,769.40 : x
  2. Step 2: Convert to fraction form
    18,231.80/27,363.90 = 15,769.40/x
  3. Step 3: Cross multiply
    18,231.80x = 27,363.90 × 15,769.40
  4. Step 4: Simplify right side
    18,231.80x = 431,512,284.66
  5. Step 5: Solve for x
    x = 431,512,284.66/18,231.80
  6. Step 6: Final answer
    x = 23,668.11

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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.