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Finding the Fourth Proportional to 8,641.41, 11,918.78 and 6,517.03

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Solution

The fourth proportional to 8,641.41, 11,918.78 and 6,517.03 is: 8,988.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,641.41 : 11,918.78 = 6,517.03 : x
  2. Step 2: Convert to fraction form
    8,641.41/11,918.78 = 6,517.03/x
  3. Step 3: Cross multiply
    8,641.41x = 11,918.78 × 6,517.03
  4. Step 4: Simplify right side
    8,641.41x = 77,675,046.82
  5. Step 5: Solve for x
    x = 77,675,046.82/8,641.41
  6. Step 6: Final answer
    x = 8,988.70

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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.