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Finding the Fourth Proportional to 8,643.35, 11,949.03 and 8,564.38

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Solution

The fourth proportional to 8,643.35, 11,949.03 and 8,564.38 is: 11,839.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,643.35 : 11,949.03 = 8,564.38 : x
  2. Step 2: Convert to fraction form
    8,643.35/11,949.03 = 8,564.38/x
  3. Step 3: Cross multiply
    8,643.35x = 11,949.03 × 8,564.38
  4. Step 4: Simplify right side
    8,643.35x = 102,336,033.55
  5. Step 5: Solve for x
    x = 102,336,033.55/8,643.35
  6. Step 6: Final answer
    x = 11,839.86

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Double scale
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Similar ratio
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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.