Home / 12,519.80-18,778.47-3,285.80

Finding the Fourth Proportional to 12,519.80, 18,778.47 and 3,285.80

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Solution

The fourth proportional to 12,519.80, 18,778.47 and 3,285.80 is: 4,928.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,519.80 : 18,778.47 = 3,285.80 : x
  2. Step 2: Convert to fraction form
    12,519.80/18,778.47 = 3,285.80/x
  3. Step 3: Cross multiply
    12,519.80x = 18,778.47 × 3,285.80
  4. Step 4: Simplify right side
    12,519.80x = 61,702,202.83
  5. Step 5: Solve for x
    x = 61,702,202.83/12,519.80
  6. Step 6: Final answer
    x = 4,928.37

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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.