Home / 20,780.84-31,175.33-7,633.31

Finding the Fourth Proportional to 20,780.84, 31,175.33 and 7,633.31

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Solution

The fourth proportional to 20,780.84, 31,175.33 and 7,633.31 is: 11,451.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.84 : 31,175.33 = 7,633.31 : x
  2. Step 2: Convert to fraction form
    20,780.84/31,175.33 = 7,633.31/x
  3. Step 3: Cross multiply
    20,780.84x = 31,175.33 × 7,633.31
  4. Step 4: Simplify right side
    20,780.84x = 237,970,920.08
  5. Step 5: Solve for x
    x = 237,970,920.08/20,780.84
  6. Step 6: Final answer
    x = 11,451.46

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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.