Home / 13,539.77-20,309.94-4,179.80

Finding the Fourth Proportional to 13,539.77, 20,309.94 and 4,179.80

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Solution

The fourth proportional to 13,539.77, 20,309.94 and 4,179.80 is: 6,269.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,539.77 : 20,309.94 = 4,179.80 : x
  2. Step 2: Convert to fraction form
    13,539.77/20,309.94 = 4,179.80/x
  3. Step 3: Cross multiply
    13,539.77x = 20,309.94 × 4,179.80
  4. Step 4: Simplify right side
    13,539.77x = 84,891,385.66
  5. Step 5: Solve for x
    x = 84,891,385.66/13,539.77
  6. Step 6: Final answer
    x = 6,269.78

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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.