Home / 12,177.90-18,269.58-3,857.28

Finding the Fourth Proportional to 12,177.90, 18,269.58 and 3,857.28

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Solution

The fourth proportional to 12,177.90, 18,269.58 and 3,857.28 is: 5,786.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,177.90 : 18,269.58 = 3,857.28 : x
  2. Step 2: Convert to fraction form
    12,177.90/18,269.58 = 3,857.28/x
  3. Step 3: Cross multiply
    12,177.90x = 18,269.58 × 3,857.28
  4. Step 4: Simplify right side
    12,177.90x = 70,470,885.54
  5. Step 5: Solve for x
    x = 70,470,885.54/12,177.90
  6. Step 6: Final answer
    x = 5,786.78

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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.