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Finding the Fourth Proportional to 28,433.74, 39,197.02 and 19,909

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Solution

The fourth proportional to 28,433.74, 39,197.02 and 19,909 is: 27,445.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,433.74 : 39,197.02 = 19,909 : x
  2. Step 2: Convert to fraction form
    28,433.74/39,197.02 = 19,909/x
  3. Step 3: Cross multiply
    28,433.74x = 39,197.02 × 19,909
  4. Step 4: Simplify right side
    28,433.74x = 780,373,471.18
  5. Step 5: Solve for x
    x = 780,373,471.18/28,433.74
  6. Step 6: Final answer
    x = 27,445.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.