Home / 30,255.39-45,353.93-20,372.61

Finding the Fourth Proportional to 30,255.39, 45,353.93 and 20,372.61

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Solution

The fourth proportional to 30,255.39, 45,353.93 and 20,372.61 is: 30,539.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,255.39 : 45,353.93 = 20,372.61 : x
  2. Step 2: Convert to fraction form
    30,255.39/45,353.93 = 20,372.61/x
  3. Step 3: Cross multiply
    30,255.39x = 45,353.93 × 20,372.61
  4. Step 4: Simplify right side
    30,255.39x = 923,977,825.99
  5. Step 5: Solve for x
    x = 923,977,825.99/30,255.39
  6. Step 6: Final answer
    x = 30,539.28

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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.