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Finding the Fourth Proportional to 55,020.80, 82,531.20 and 18,084.80

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Solution

The fourth proportional to 55,020.80, 82,531.20 and 18,084.80 is: 27,127.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,020.80 : 82,531.20 = 18,084.80 : x
  2. Step 2: Convert to fraction form
    55,020.80/82,531.20 = 18,084.80/x
  3. Step 3: Cross multiply
    55,020.80x = 82,531.20 × 18,084.80
  4. Step 4: Simplify right side
    55,020.80x = 1,492,560,245.76
  5. Step 5: Solve for x
    x = 1,492,560,245.76/55,020.80
  6. Step 6: Final answer
    x = 27,127.20

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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.