Home / 12,150.48-18,234.60-7,778.64

Finding the Fourth Proportional to 12,150.48, 18,234.60 and 7,778.64

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Solution

The fourth proportional to 12,150.48, 18,234.60 and 7,778.64 is: 11,673.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,150.48 : 18,234.60 = 7,778.64 : x
  2. Step 2: Convert to fraction form
    12,150.48/18,234.60 = 7,778.64/x
  3. Step 3: Cross multiply
    12,150.48x = 18,234.60 × 7,778.64
  4. Step 4: Simplify right side
    12,150.48x = 141,840,388.94
  5. Step 5: Solve for x
    x = 141,840,388.94/12,150.48
  6. Step 6: Final answer
    x = 11,673.64

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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.