Home / 20,881.80-31,327.83-6,090.86

Finding the Fourth Proportional to 20,881.80, 31,327.83 and 6,090.86

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Solution

The fourth proportional to 20,881.80, 31,327.83 and 6,090.86 is: 9,137.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.80 : 31,327.83 = 6,090.86 : x
  2. Step 2: Convert to fraction form
    20,881.80/31,327.83 = 6,090.86/x
  3. Step 3: Cross multiply
    20,881.80x = 31,327.83 × 6,090.86
  4. Step 4: Simplify right side
    20,881.80x = 190,813,504.95
  5. Step 5: Solve for x
    x = 190,813,504.95/20,881.80
  6. Step 6: Final answer
    x = 9,137.79

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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.