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Finding the Fourth Proportional to 12,628.40, 17,409 and 8,839.88

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Solution

The fourth proportional to 12,628.40, 17,409 and 8,839.88 is: 12,186.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,628.40 : 17,409 = 8,839.88 : x
  2. Step 2: Convert to fraction form
    12,628.40/17,409 = 8,839.88/x
  3. Step 3: Cross multiply
    12,628.40x = 17,409 × 8,839.88
  4. Step 4: Simplify right side
    12,628.40x = 153,893,470.92
  5. Step 5: Solve for x
    x = 153,893,470.92/12,628.40
  6. Step 6: Final answer
    x = 12,186.30

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