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Finding the Fourth Proportional to 18,017.25, 27,018.99 and 8,654.60

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Solution

The fourth proportional to 18,017.25, 27,018.99 and 8,654.60 is: 12,978.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,017.25 : 27,018.99 = 8,654.60 : x
  2. Step 2: Convert to fraction form
    18,017.25/27,018.99 = 8,654.60/x
  3. Step 3: Cross multiply
    18,017.25x = 27,018.99 × 8,654.60
  4. Step 4: Simplify right side
    18,017.25x = 233,838,550.85
  5. Step 5: Solve for x
    x = 233,838,550.85/18,017.25
  6. Step 6: Final answer
    x = 12,978.59

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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.