Home / 12,155.80-18,240.90-8,007.70

Finding the Fourth Proportional to 12,155.80, 18,240.90 and 8,007.70

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Solution

The fourth proportional to 12,155.80, 18,240.90 and 8,007.70 is: 12,016.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,155.80 : 18,240.90 = 8,007.70 : x
  2. Step 2: Convert to fraction form
    12,155.80/18,240.90 = 8,007.70/x
  3. Step 3: Cross multiply
    12,155.80x = 18,240.90 × 8,007.70
  4. Step 4: Simplify right side
    12,155.80x = 146,067,654.93
  5. Step 5: Solve for x
    x = 146,067,654.93/12,155.80
  6. Step 6: Final answer
    x = 12,016.29

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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.