Home / 20,679.57-31,022.85-6,639.33

Finding the Fourth Proportional to 20,679.57, 31,022.85 and 6,639.33

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Solution

The fourth proportional to 20,679.57, 31,022.85 and 6,639.33 is: 9,960.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.57 : 31,022.85 = 6,639.33 : x
  2. Step 2: Convert to fraction form
    20,679.57/31,022.85 = 6,639.33/x
  3. Step 3: Cross multiply
    20,679.57x = 31,022.85 × 6,639.33
  4. Step 4: Simplify right side
    20,679.57x = 205,970,938.69
  5. Step 5: Solve for x
    x = 205,970,938.69/20,679.57
  6. Step 6: Final answer
    x = 9,960.12

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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.