Home / 20,231.56-30,321.42-9,135.37

Finding the Fourth Proportional to 20,231.56, 30,321.42 and 9,135.37

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Solution

The fourth proportional to 20,231.56, 30,321.42 and 9,135.37 is: 13,691.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,231.56 : 30,321.42 = 9,135.37 : x
  2. Step 2: Convert to fraction form
    20,231.56/30,321.42 = 9,135.37/x
  3. Step 3: Cross multiply
    20,231.56x = 30,321.42 × 9,135.37
  4. Step 4: Simplify right side
    20,231.56x = 276,997,390.63
  5. Step 5: Solve for x
    x = 276,997,390.63/20,231.56
  6. Step 6: Final answer
    x = 13,691.35

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1.5x scale

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.