Home / 20,265.05-30,376.78-7,781.72

Finding the Fourth Proportional to 20,265.05, 30,376.78 and 7,781.72

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Solution

The fourth proportional to 20,265.05, 30,376.78 and 7,781.72 is: 11,664.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,265.05 : 30,376.78 = 7,781.72 : x
  2. Step 2: Convert to fraction form
    20,265.05/30,376.78 = 7,781.72/x
  3. Step 3: Cross multiply
    20,265.05x = 30,376.78 × 7,781.72
  4. Step 4: Simplify right side
    20,265.05x = 236,383,425.12
  5. Step 5: Solve for x
    x = 236,383,425.12/20,265.05
  6. Step 6: Final answer
    x = 11,664.58

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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.