Home / 13,938.12-20,906.64-5,169.12

Finding the Fourth Proportional to 13,938.12, 20,906.64 and 5,169.12

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Solution

The fourth proportional to 13,938.12, 20,906.64 and 5,169.12 is: 7,753.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.12 : 20,906.64 = 5,169.12 : x
  2. Step 2: Convert to fraction form
    13,938.12/20,906.64 = 5,169.12/x
  3. Step 3: Cross multiply
    13,938.12x = 20,906.64 × 5,169.12
  4. Step 4: Simplify right side
    13,938.12x = 108,068,930.96
  5. Step 5: Solve for x
    x = 108,068,930.96/13,938.12
  6. Step 6: Final answer
    x = 7,753.48

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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.