Home / 20,664.96-30,999.48-6,621.45

Finding the Fourth Proportional to 20,664.96, 30,999.48 and 6,621.45

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Solution

The fourth proportional to 20,664.96, 30,999.48 and 6,621.45 is: 9,932.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664.96 : 30,999.48 = 6,621.45 : x
  2. Step 2: Convert to fraction form
    20,664.96/30,999.48 = 6,621.45/x
  3. Step 3: Cross multiply
    20,664.96x = 30,999.48 × 6,621.45
  4. Step 4: Simplify right side
    20,664.96x = 205,261,506.85
  5. Step 5: Solve for x
    x = 205,261,506.85/20,664.96
  6. Step 6: Final answer
    x = 9,932.83

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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.