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Finding the Fourth Proportional to 8,636.32, 11,923.86 and 6,643.36

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Solution

The fourth proportional to 8,636.32, 11,923.86 and 6,643.36 is: 9,172.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,636.32 : 11,923.86 = 6,643.36 : x
  2. Step 2: Convert to fraction form
    8,636.32/11,923.86 = 6,643.36/x
  3. Step 3: Cross multiply
    8,636.32x = 11,923.86 × 6,643.36
  4. Step 4: Simplify right side
    8,636.32x = 79,214,494.57
  5. Step 5: Solve for x
    x = 79,214,494.57/8,636.32
  6. Step 6: Final answer
    x = 9,172.25

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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.