Home / 20,212.34-30,317.85-5,420.48

Finding the Fourth Proportional to 20,212.34, 30,317.85 and 5,420.48

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Solution

The fourth proportional to 20,212.34, 30,317.85 and 5,420.48 is: 8,130.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,212.34 : 30,317.85 = 5,420.48 : x
  2. Step 2: Convert to fraction form
    20,212.34/30,317.85 = 5,420.48/x
  3. Step 3: Cross multiply
    20,212.34x = 30,317.85 × 5,420.48
  4. Step 4: Simplify right side
    20,212.34x = 164,337,147.98
  5. Step 5: Solve for x
    x = 164,337,147.98/20,212.34
  6. Step 6: Final answer
    x = 8,130.54

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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.