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Finding the Fourth Proportional to 12,418.31, 17,137.27 and 6,829.31

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Solution

The fourth proportional to 12,418.31, 17,137.27 and 6,829.31 is: 9,424.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,418.31 : 17,137.27 = 6,829.31 : x
  2. Step 2: Convert to fraction form
    12,418.31/17,137.27 = 6,829.31/x
  3. Step 3: Cross multiply
    12,418.31x = 17,137.27 × 6,829.31
  4. Step 4: Simplify right side
    12,418.31x = 117,035,780.76
  5. Step 5: Solve for x
    x = 117,035,780.76/12,418.31
  6. Step 6: Final answer
    x = 9,424.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.