Home / 20,530.80-30,791.34-9,430.56

Finding the Fourth Proportional to 20,530.80, 30,791.34 and 9,430.56

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Solution

The fourth proportional to 20,530.80, 30,791.34 and 9,430.56 is: 14,143.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.80 : 30,791.34 = 9,430.56 : x
  2. Step 2: Convert to fraction form
    20,530.80/30,791.34 = 9,430.56/x
  3. Step 3: Cross multiply
    20,530.80x = 30,791.34 × 9,430.56
  4. Step 4: Simplify right side
    20,530.80x = 290,379,579.35
  5. Step 5: Solve for x
    x = 290,379,579.35/20,530.80
  6. Step 6: Final answer
    x = 14,143.61

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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.