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Finding the Fourth Proportional to 55,273.61, 82,910.42 and 13,720.61

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Solution

The fourth proportional to 55,273.61, 82,910.42 and 13,720.61 is: 20,580.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,273.61 : 82,910.42 = 13,720.61 : x
  2. Step 2: Convert to fraction form
    55,273.61/82,910.42 = 13,720.61/x
  3. Step 3: Cross multiply
    55,273.61x = 82,910.42 × 13,720.61
  4. Step 4: Simplify right side
    55,273.61x = 1,137,581,054.60
  5. Step 5: Solve for x
    x = 1,137,581,054.60/55,273.61
  6. Step 6: Final answer
    x = 20,580.91

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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.