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Finding the Fourth Proportional to 18,615.71, 27,911.37 and 6,767.30

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Solution

The fourth proportional to 18,615.71, 27,911.37 and 6,767.30 is: 10,146.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,615.71 : 27,911.37 = 6,767.30 : x
  2. Step 2: Convert to fraction form
    18,615.71/27,911.37 = 6,767.30/x
  3. Step 3: Cross multiply
    18,615.71x = 27,911.37 × 6,767.30
  4. Step 4: Simplify right side
    18,615.71x = 188,884,614.20
  5. Step 5: Solve for x
    x = 188,884,614.20/18,615.71
  6. Step 6: Final answer
    x = 10,146.52

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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.