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Finding the Fourth Proportional to 18,654.12, 27,961.58 and 8,263.40

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Solution

The fourth proportional to 18,654.12, 27,961.58 and 8,263.40 is: 12,386.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,654.12 : 27,961.58 = 8,263.40 : x
  2. Step 2: Convert to fraction form
    18,654.12/27,961.58 = 8,263.40/x
  3. Step 3: Cross multiply
    18,654.12x = 27,961.58 × 8,263.40
  4. Step 4: Simplify right side
    18,654.12x = 231,057,720.17
  5. Step 5: Solve for x
    x = 231,057,720.17/18,654.12
  6. Step 6: Final answer
    x = 12,386.42

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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.