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Finding the Fourth Proportional to 13,654.58, 18,836.55 and 8,340.17

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Solution

The fourth proportional to 13,654.58, 18,836.55 and 8,340.17 is: 11,505.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,654.58 : 18,836.55 = 8,340.17 : x
  2. Step 2: Convert to fraction form
    13,654.58/18,836.55 = 8,340.17/x
  3. Step 3: Cross multiply
    13,654.58x = 18,836.55 × 8,340.17
  4. Step 4: Simplify right side
    13,654.58x = 157,099,935.03
  5. Step 5: Solve for x
    x = 157,099,935.03/13,654.58
  6. Step 6: Final answer
    x = 11,505.30

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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.