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Finding the Fourth Proportional to 12,908.80, 17,817.96 and 7,605.33

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Solution

The fourth proportional to 12,908.80, 17,817.96 and 7,605.33 is: 10,497.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,908.80 : 17,817.96 = 7,605.33 : x
  2. Step 2: Convert to fraction form
    12,908.80/17,817.96 = 7,605.33/x
  3. Step 3: Cross multiply
    12,908.80x = 17,817.96 × 7,605.33
  4. Step 4: Simplify right side
    12,908.80x = 135,511,465.73
  5. Step 5: Solve for x
    x = 135,511,465.73/12,908.80
  6. Step 6: Final answer
    x = 10,497.60

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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.