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Finding the Fourth Proportional to 8,072.64, 11,131.74 and 6,391.32

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Solution

The fourth proportional to 8,072.64, 11,131.74 and 6,391.32 is: 8,813.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,072.64 : 11,131.74 = 6,391.32 : x
  2. Step 2: Convert to fraction form
    8,072.64/11,131.74 = 6,391.32/x
  3. Step 3: Cross multiply
    8,072.64x = 11,131.74 × 6,391.32
  4. Step 4: Simplify right side
    8,072.64x = 71,146,512.50
  5. Step 5: Solve for x
    x = 71,146,512.50/8,072.64
  6. Step 6: Final answer
    x = 8,813.29

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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.