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Finding the Fourth Proportional to 12,985.26, 19,481.12 and 3,751.26

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Solution

The fourth proportional to 12,985.26, 19,481.12 and 3,751.26 is: 5,627.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.26 : 19,481.12 = 3,751.26 : x
  2. Step 2: Convert to fraction form
    12,985.26/19,481.12 = 3,751.26/x
  3. Step 3: Cross multiply
    12,985.26x = 19,481.12 × 3,751.26
  4. Step 4: Simplify right side
    12,985.26x = 73,078,746.21
  5. Step 5: Solve for x
    x = 73,078,746.21/12,985.26
  6. Step 6: Final answer
    x = 5,627.82

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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.