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Finding the Fourth Proportional to 18,455.61, 27,687.42 and 5,976.90

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Solution

The fourth proportional to 18,455.61, 27,687.42 and 5,976.90 is: 8,966.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,455.61 : 27,687.42 = 5,976.90 : x
  2. Step 2: Convert to fraction form
    18,455.61/27,687.42 = 5,976.90/x
  3. Step 3: Cross multiply
    18,455.61x = 27,687.42 × 5,976.90
  4. Step 4: Simplify right side
    18,455.61x = 165,484,940.60
  5. Step 5: Solve for x
    x = 165,484,940.60/18,455.61
  6. Step 6: Final answer
    x = 8,966.65

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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.