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Finding the Fourth Proportional to 10,659.83, 15,989.80 and 2,761.80

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Solution

The fourth proportional to 10,659.83, 15,989.80 and 2,761.80 is: 4,142.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,659.83 : 15,989.80 = 2,761.80 : x
  2. Step 2: Convert to fraction form
    10,659.83/15,989.80 = 2,761.80/x
  3. Step 3: Cross multiply
    10,659.83x = 15,989.80 × 2,761.80
  4. Step 4: Simplify right side
    10,659.83x = 44,160,566.01
  5. Step 5: Solve for x
    x = 44,160,566.01/10,659.83
  6. Step 6: Final answer
    x = 4,142.71

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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.