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Finding the Fourth Proportional to 8,682.32, 11,980.89 and 4,905.81

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Solution

The fourth proportional to 8,682.32, 11,980.89 and 4,905.81 is: 6,769.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,682.32 : 11,980.89 = 4,905.81 : x
  2. Step 2: Convert to fraction form
    8,682.32/11,980.89 = 4,905.81/x
  3. Step 3: Cross multiply
    8,682.32x = 11,980.89 × 4,905.81
  4. Step 4: Simplify right side
    8,682.32x = 58,775,969.97
  5. Step 5: Solve for x
    x = 58,775,969.97/8,682.32
  6. Step 6: Final answer
    x = 6,769.62

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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.