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Finding the Fourth Proportional to 11,321.64, 15,625.71 and 8,664.03

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Solution

The fourth proportional to 11,321.64, 15,625.71 and 8,664.03 is: 11,957.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,321.64 : 15,625.71 = 8,664.03 : x
  2. Step 2: Convert to fraction form
    11,321.64/15,625.71 = 8,664.03/x
  3. Step 3: Cross multiply
    11,321.64x = 15,625.71 × 8,664.03
  4. Step 4: Simplify right side
    11,321.64x = 135,381,620.21
  5. Step 5: Solve for x
    x = 135,381,620.21/11,321.64
  6. Step 6: Final answer
    x = 11,957.77

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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.