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Finding the Fourth Proportional to 18,487.80, 27,705.16 and 7,954.96

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Solution

The fourth proportional to 18,487.80, 27,705.16 and 7,954.96 is: 11,921.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,487.80 : 27,705.16 = 7,954.96 : x
  2. Step 2: Convert to fraction form
    18,487.80/27,705.16 = 7,954.96/x
  3. Step 3: Cross multiply
    18,487.80x = 27,705.16 × 7,954.96
  4. Step 4: Simplify right side
    18,487.80x = 220,393,439.59
  5. Step 5: Solve for x
    x = 220,393,439.59/18,487.80
  6. Step 6: Final answer
    x = 11,921.02

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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.