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Finding the Fourth Proportional to 18,941.68, 28,405.68 and 5,610.70

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Solution

The fourth proportional to 18,941.68, 28,405.68 and 5,610.70 is: 8,414.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,941.68 : 28,405.68 = 5,610.70 : x
  2. Step 2: Convert to fraction form
    18,941.68/28,405.68 = 5,610.70/x
  3. Step 3: Cross multiply
    18,941.68x = 28,405.68 × 5,610.70
  4. Step 4: Simplify right side
    18,941.68x = 159,375,748.78
  5. Step 5: Solve for x
    x = 159,375,748.78/18,941.68
  6. Step 6: Final answer
    x = 8,414.02

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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.