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Finding the Fourth Proportional to 8,936.62, 12,347.88 and 8,621.26

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Solution

The fourth proportional to 8,936.62, 12,347.88 and 8,621.26 is: 11,912.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,936.62 : 12,347.88 = 8,621.26 : x
  2. Step 2: Convert to fraction form
    8,936.62/12,347.88 = 8,621.26/x
  3. Step 3: Cross multiply
    8,936.62x = 12,347.88 × 8,621.26
  4. Step 4: Simplify right side
    8,936.62x = 106,454,283.93
  5. Step 5: Solve for x
    x = 106,454,283.93/8,936.62
  6. Step 6: Final answer
    x = 11,912.14

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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.