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Finding the Fourth Proportional to 12,339.84, 17,028.96 and 6,961.92

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Solution

The fourth proportional to 12,339.84, 17,028.96 and 6,961.92 is: 9,607.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,339.84 : 17,028.96 = 6,961.92 : x
  2. Step 2: Convert to fraction form
    12,339.84/17,028.96 = 6,961.92/x
  3. Step 3: Cross multiply
    12,339.84x = 17,028.96 × 6,961.92
  4. Step 4: Simplify right side
    12,339.84x = 118,554,257.20
  5. Step 5: Solve for x
    x = 118,554,257.20/12,339.84
  6. Step 6: Final answer
    x = 9,607.44

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1.5x scale

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.