Home / 13,891.45-20,816.29-8,338.75

Finding the Fourth Proportional to 13,891.45, 20,816.29 and 8,338.75

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Solution

The fourth proportional to 13,891.45, 20,816.29 and 8,338.75 is: 12,495.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,891.45 : 20,816.29 = 8,338.75 : x
  2. Step 2: Convert to fraction form
    13,891.45/20,816.29 = 8,338.75/x
  3. Step 3: Cross multiply
    13,891.45x = 20,816.29 × 8,338.75
  4. Step 4: Simplify right side
    13,891.45x = 173,581,796.62
  5. Step 5: Solve for x
    x = 173,581,796.62/13,891.45
  6. Step 6: Final answer
    x = 12,495.59

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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.