Home / 20,675.85-28,531.80-11,723.96

Finding the Fourth Proportional to 20,675.85, 28,531.80 and 11,723.96

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Solution

The fourth proportional to 20,675.85, 28,531.80 and 11,723.96 is: 16,178.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,675.85 : 28,531.80 = 11,723.96 : x
  2. Step 2: Convert to fraction form
    20,675.85/28,531.80 = 11,723.96/x
  3. Step 3: Cross multiply
    20,675.85x = 28,531.80 × 11,723.96
  4. Step 4: Simplify right side
    20,675.85x = 334,505,539.27
  5. Step 5: Solve for x
    x = 334,505,539.27/20,675.85
  6. Step 6: Final answer
    x = 16,178.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.