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Finding the Fourth Proportional to 9,387.67, 12,939.96 and 6,361.87

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Solution

The fourth proportional to 9,387.67, 12,939.96 and 6,361.87 is: 8,769.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,387.67 : 12,939.96 = 6,361.87 : x
  2. Step 2: Convert to fraction form
    9,387.67/12,939.96 = 6,361.87/x
  3. Step 3: Cross multiply
    9,387.67x = 12,939.96 × 6,361.87
  4. Step 4: Simplify right side
    9,387.67x = 82,322,343.33
  5. Step 5: Solve for x
    x = 82,322,343.33/9,387.67
  6. Step 6: Final answer
    x = 8,769.20

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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.