Home / 28,639.62-42,937.82-18,781.38

Finding the Fourth Proportional to 28,639.62, 42,937.82 and 18,781.38

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Solution

The fourth proportional to 28,639.62, 42,937.82 and 18,781.38 is: 28,157.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,639.62 : 42,937.82 = 18,781.38 : x
  2. Step 2: Convert to fraction form
    28,639.62/42,937.82 = 18,781.38/x
  3. Step 3: Cross multiply
    28,639.62x = 42,937.82 × 18,781.38
  4. Step 4: Simplify right side
    28,639.62x = 806,431,513.79
  5. Step 5: Solve for x
    x = 806,431,513.79/28,639.62
  6. Step 6: Final answer
    x = 28,157.90

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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.