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Finding the Fourth Proportional to 18,519.80, 27,774.66 and 8,129.08

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Solution

The fourth proportional to 18,519.80, 27,774.66 and 8,129.08 is: 12,191.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,519.80 : 27,774.66 = 8,129.08 : x
  2. Step 2: Convert to fraction form
    18,519.80/27,774.66 = 8,129.08/x
  3. Step 3: Cross multiply
    18,519.80x = 27,774.66 × 8,129.08
  4. Step 4: Simplify right side
    18,519.80x = 225,782,433.11
  5. Step 5: Solve for x
    x = 225,782,433.11/18,519.80
  6. Step 6: Final answer
    x = 12,191.41

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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.