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Finding the Fourth Proportional to 55,857, 83,800.62 and 18,921

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Solution

The fourth proportional to 55,857, 83,800.62 and 18,921 is: 28,386.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,857 : 83,800.62 = 18,921 : x
  2. Step 2: Convert to fraction form
    55,857/83,800.62 = 18,921/x
  3. Step 3: Cross multiply
    55,857x = 83,800.62 × 18,921
  4. Step 4: Simplify right side
    55,857x = 1,585,591,531.02
  5. Step 5: Solve for x
    x = 1,585,591,531.02/55,857
  6. Step 6: Final answer
    x = 28,386.62

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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.