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Finding the Fourth Proportional to 9,375.96, 12,912.57 and 9,171.84

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Solution

The fourth proportional to 9,375.96, 12,912.57 and 9,171.84 is: 12,631.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,375.96 : 12,912.57 = 9,171.84 : x
  2. Step 2: Convert to fraction form
    9,375.96/12,912.57 = 9,171.84/x
  3. Step 3: Cross multiply
    9,375.96x = 12,912.57 × 9,171.84
  4. Step 4: Simplify right side
    9,375.96x = 118,432,026.03
  5. Step 5: Solve for x
    x = 118,432,026.03/9,375.96
  6. Step 6: Final answer
    x = 12,631.46

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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.