Home / 13,910.17-20,850.68-5,139.49

Finding the Fourth Proportional to 13,910.17, 20,850.68 and 5,139.49

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Solution

The fourth proportional to 13,910.17, 20,850.68 and 5,139.49 is: 7,703.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,910.17 : 20,850.68 = 5,139.49 : x
  2. Step 2: Convert to fraction form
    13,910.17/20,850.68 = 5,139.49/x
  3. Step 3: Cross multiply
    13,910.17x = 20,850.68 × 5,139.49
  4. Step 4: Simplify right side
    13,910.17x = 107,161,942.76
  5. Step 5: Solve for x
    x = 107,161,942.76/13,910.17
  6. Step 6: Final answer
    x = 7,703.85

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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.