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Finding the Fourth Proportional to 8,318.11, 11,477.90 and 4,961.32

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Solution

The fourth proportional to 8,318.11, 11,477.90 and 4,961.32 is: 6,845.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,318.11 : 11,477.90 = 4,961.32 : x
  2. Step 2: Convert to fraction form
    8,318.11/11,477.90 = 4,961.32/x
  3. Step 3: Cross multiply
    8,318.11x = 11,477.90 × 4,961.32
  4. Step 4: Simplify right side
    8,318.11x = 56,945,534.83
  5. Step 5: Solve for x
    x = 56,945,534.83/8,318.11
  6. Step 6: Final answer
    x = 6,845.97

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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.