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Finding the Fourth Proportional to 18,502.90, 27,756.10 and 5,175.89

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Solution

The fourth proportional to 18,502.90, 27,756.10 and 5,175.89 is: 7,764.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,502.90 : 27,756.10 = 5,175.89 : x
  2. Step 2: Convert to fraction form
    18,502.90/27,756.10 = 5,175.89/x
  3. Step 3: Cross multiply
    18,502.90x = 27,756.10 × 5,175.89
  4. Step 4: Simplify right side
    18,502.90x = 143,662,576.88
  5. Step 5: Solve for x
    x = 143,662,576.88/18,502.90
  6. Step 6: Final answer
    x = 7,764.33

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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.