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Finding the Fourth Proportional to 8,641.62, 11,922.21 and 5,659.11

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Solution

The fourth proportional to 8,641.62, 11,922.21 and 5,659.11 is: 7,807.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,641.62 : 11,922.21 = 5,659.11 : x
  2. Step 2: Convert to fraction form
    8,641.62/11,922.21 = 5,659.11/x
  3. Step 3: Cross multiply
    8,641.62x = 11,922.21 × 5,659.11
  4. Step 4: Simplify right side
    8,641.62x = 67,469,097.83
  5. Step 5: Solve for x
    x = 67,469,097.83/8,641.62
  6. Step 6: Final answer
    x = 7,807.46

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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.