Home / 20,138.17-30,209.36-6,812.73

Finding the Fourth Proportional to 20,138.17, 30,209.36 and 6,812.73

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Solution

The fourth proportional to 20,138.17, 30,209.36 and 6,812.73 is: 10,219.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.17 : 30,209.36 = 6,812.73 : x
  2. Step 2: Convert to fraction form
    20,138.17/30,209.36 = 6,812.73/x
  3. Step 3: Cross multiply
    20,138.17x = 30,209.36 × 6,812.73
  4. Step 4: Simplify right side
    20,138.17x = 205,808,213.15
  5. Step 5: Solve for x
    x = 205,808,213.15/20,138.17
  6. Step 6: Final answer
    x = 10,219.81

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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.