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Finding the Fourth Proportional to 12,873.60, 17,761.68 and 9,361.44

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Solution

The fourth proportional to 12,873.60, 17,761.68 and 9,361.44 is: 12,915.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,873.60 : 17,761.68 = 9,361.44 : x
  2. Step 2: Convert to fraction form
    12,873.60/17,761.68 = 9,361.44/x
  3. Step 3: Cross multiply
    12,873.60x = 17,761.68 × 9,361.44
  4. Step 4: Simplify right side
    12,873.60x = 166,274,901.62
  5. Step 5: Solve for x
    x = 166,274,901.62/12,873.60
  6. Step 6: Final answer
    x = 12,915.96

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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.