Home / 20,231.28-30,336-9,124.98

Finding the Fourth Proportional to 20,231.28, 30,336 and 9,124.98

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Solution

The fourth proportional to 20,231.28, 30,336 and 9,124.98 is: 13,682.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,231.28 : 30,336 = 9,124.98 : x
  2. Step 2: Convert to fraction form
    20,231.28/30,336 = 9,124.98/x
  3. Step 3: Cross multiply
    20,231.28x = 30,336 × 9,124.98
  4. Step 4: Simplify right side
    20,231.28x = 276,815,393.28
  5. Step 5: Solve for x
    x = 276,815,393.28/20,231.28
  6. Step 6: Final answer
    x = 13,682.54

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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.