Home / 20,432.24-30,636-13,321.75

Finding the Fourth Proportional to 20,432.24, 30,636 and 13,321.75

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Solution

The fourth proportional to 20,432.24, 30,636 and 13,321.75 is: 19,974.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,432.24 : 30,636 = 13,321.75 : x
  2. Step 2: Convert to fraction form
    20,432.24/30,636 = 13,321.75/x
  3. Step 3: Cross multiply
    20,432.24x = 30,636 × 13,321.75
  4. Step 4: Simplify right side
    20,432.24x = 408,125,133
  5. Step 5: Solve for x
    x = 408,125,133/20,432.24
  6. Step 6: Final answer
    x = 19,974.57

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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.