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Finding the Fourth Proportional to 18,536.78, 27,805.17 and 4,685.78

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Solution

The fourth proportional to 18,536.78, 27,805.17 and 4,685.78 is: 7,028.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,536.78 : 27,805.17 = 4,685.78 : x
  2. Step 2: Convert to fraction form
    18,536.78/27,805.17 = 4,685.78/x
  3. Step 3: Cross multiply
    18,536.78x = 27,805.17 × 4,685.78
  4. Step 4: Simplify right side
    18,536.78x = 130,288,909.48
  5. Step 5: Solve for x
    x = 130,288,909.48/18,536.78
  6. Step 6: Final answer
    x = 7,028.67

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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.