Home / 20,425.90-30,635.20-5,433.10

Finding the Fourth Proportional to 20,425.90, 30,635.20 and 5,433.10

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Solution

The fourth proportional to 20,425.90, 30,635.20 and 5,433.10 is: 8,148.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.90 : 30,635.20 = 5,433.10 : x
  2. Step 2: Convert to fraction form
    20,425.90/30,635.20 = 5,433.10/x
  3. Step 3: Cross multiply
    20,425.90x = 30,635.20 × 5,433.10
  4. Step 4: Simplify right side
    20,425.90x = 166,444,105.12
  5. Step 5: Solve for x
    x = 166,444,105.12/20,425.90
  6. Step 6: Final answer
    x = 8,148.68

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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.