Home / 12,418.40-17,137.16-6,829.28

Finding the Fourth Proportional to 12,418.40, 17,137.16 and 6,829.28

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Solution

The fourth proportional to 12,418.40, 17,137.16 and 6,829.28 is: 9,424.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,418.40 : 17,137.16 = 6,829.28 : x
  2. Step 2: Convert to fraction form
    12,418.40/17,137.16 = 6,829.28/x
  3. Step 3: Cross multiply
    12,418.40x = 17,137.16 × 6,829.28
  4. Step 4: Simplify right side
    12,418.40x = 117,034,464.04
  5. Step 5: Solve for x
    x = 117,034,464.04/12,418.40
  6. Step 6: Final answer
    x = 9,424.28

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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.