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Finding the Fourth Proportional to 18,751.62, 28,113.56 and 11,354.34

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Solution

The fourth proportional to 18,751.62, 28,113.56 and 11,354.34 is: 17,023.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.62 : 28,113.56 = 11,354.34 : x
  2. Step 2: Convert to fraction form
    18,751.62/28,113.56 = 11,354.34/x
  3. Step 3: Cross multiply
    18,751.62x = 28,113.56 × 11,354.34
  4. Step 4: Simplify right side
    18,751.62x = 319,210,918.85
  5. Step 5: Solve for x
    x = 319,210,918.85/18,751.62
  6. Step 6: Final answer
    x = 17,023.11

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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.