Home / 13,728.89-20,694.83-12,926.20

Finding the Fourth Proportional to 13,728.89, 20,694.83 and 12,926.20

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Solution

The fourth proportional to 13,728.89, 20,694.83 and 12,926.20 is: 19,484.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.89 : 20,694.83 = 12,926.20 : x
  2. Step 2: Convert to fraction form
    13,728.89/20,694.83 = 12,926.20/x
  3. Step 3: Cross multiply
    13,728.89x = 20,694.83 × 12,926.20
  4. Step 4: Simplify right side
    13,728.89x = 267,505,401.21
  5. Step 5: Solve for x
    x = 267,505,401.21/13,728.89
  6. Step 6: Final answer
    x = 19,484.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.