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Finding the Fourth Proportional to 18,791.68, 28,197.84 and 10,903.84

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Solution

The fourth proportional to 18,791.68, 28,197.84 and 10,903.84 is: 16,361.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.68 : 28,197.84 = 10,903.84 : x
  2. Step 2: Convert to fraction form
    18,791.68/28,197.84 = 10,903.84/x
  3. Step 3: Cross multiply
    18,791.68x = 28,197.84 × 10,903.84
  4. Step 4: Simplify right side
    18,791.68x = 307,464,735.71
  5. Step 5: Solve for x
    x = 307,464,735.71/18,791.68
  6. Step 6: Final answer
    x = 16,361.75

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1.5x scale

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.