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Finding the Fourth Proportional to 8,616.41, 11,891.94 and 5,261.18

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Solution

The fourth proportional to 8,616.41, 11,891.94 and 5,261.18 is: 7,261.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,616.41 : 11,891.94 = 5,261.18 : x
  2. Step 2: Convert to fraction form
    8,616.41/11,891.94 = 5,261.18/x
  3. Step 3: Cross multiply
    8,616.41x = 11,891.94 × 5,261.18
  4. Step 4: Simplify right side
    8,616.41x = 62,565,577.43
  5. Step 5: Solve for x
    x = 62,565,577.43/8,616.41
  6. Step 6: Final answer
    x = 7,261.22

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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.