Home / 12,226.80-18,340.20-6,385.20

Finding the Fourth Proportional to 12,226.80, 18,340.20 and 6,385.20

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Solution

The fourth proportional to 12,226.80, 18,340.20 and 6,385.20 is: 9,577.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,226.80 : 18,340.20 = 6,385.20 : x
  2. Step 2: Convert to fraction form
    12,226.80/18,340.20 = 6,385.20/x
  3. Step 3: Cross multiply
    12,226.80x = 18,340.20 × 6,385.20
  4. Step 4: Simplify right side
    12,226.80x = 117,105,845.04
  5. Step 5: Solve for x
    x = 117,105,845.04/12,226.80
  6. Step 6: Final answer
    x = 9,577.80

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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.