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Finding the Fourth Proportional to 12,654.68, 18,963.56 and 8,954.90

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Solution

The fourth proportional to 12,654.68, 18,963.56 and 8,954.90 is: 13,419.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,654.68 : 18,963.56 = 8,954.90 : x
  2. Step 2: Convert to fraction form
    12,654.68/18,963.56 = 8,954.90/x
  3. Step 3: Cross multiply
    12,654.68x = 18,963.56 × 8,954.90
  4. Step 4: Simplify right side
    12,654.68x = 169,816,783.44
  5. Step 5: Solve for x
    x = 169,816,783.44/12,654.68
  6. Step 6: Final answer
    x = 13,419.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.