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Finding the Fourth Proportional to 33,810.60, 50,715.90 and 19,986.60

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Solution

The fourth proportional to 33,810.60, 50,715.90 and 19,986.60 is: 29,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,810.60 : 50,715.90 = 19,986.60 : x
  2. Step 2: Convert to fraction form
    33,810.60/50,715.90 = 19,986.60/x
  3. Step 3: Cross multiply
    33,810.60x = 50,715.90 × 19,986.60
  4. Step 4: Simplify right side
    33,810.60x = 1,013,638,406.94
  5. Step 5: Solve for x
    x = 1,013,638,406.94/33,810.60
  6. Step 6: Final answer
    x = 29,979.90

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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.