Home / 12,664.40-18,996.60-7,998.80

Finding the Fourth Proportional to 12,664.40, 18,996.60 and 7,998.80

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Solution

The fourth proportional to 12,664.40, 18,996.60 and 7,998.80 is: 11,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,664.40 : 18,996.60 = 7,998.80 : x
  2. Step 2: Convert to fraction form
    12,664.40/18,996.60 = 7,998.80/x
  3. Step 3: Cross multiply
    12,664.40x = 18,996.60 × 7,998.80
  4. Step 4: Simplify right side
    12,664.40x = 151,950,004.08
  5. Step 5: Solve for x
    x = 151,950,004.08/12,664.40
  6. Step 6: Final answer
    x = 11,998.20

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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.