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Finding the Fourth Proportional to 20,361.86, 30,562.50 and 9,839.28

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Solution

The fourth proportional to 20,361.86, 30,562.50 and 9,839.28 is: 14,768.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,361.86 : 30,562.50 = 9,839.28 : x
  2. Step 2: Convert to fraction form
    20,361.86/30,562.50 = 9,839.28/x
  3. Step 3: Cross multiply
    20,361.86x = 30,562.50 × 9,839.28
  4. Step 4: Simplify right side
    20,361.86x = 300,712,995
  5. Step 5: Solve for x
    x = 300,712,995/20,361.86
  6. Step 6: Final answer
    x = 14,768.44

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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.