Home / 12,186.36-18,285.24-11,989.80

Finding the Fourth Proportional to 12,186.36, 18,285.24 and 11,989.80

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Solution

The fourth proportional to 12,186.36, 18,285.24 and 11,989.80 is: 17,990.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,186.36 : 18,285.24 = 11,989.80 : x
  2. Step 2: Convert to fraction form
    12,186.36/18,285.24 = 11,989.80/x
  3. Step 3: Cross multiply
    12,186.36x = 18,285.24 × 11,989.80
  4. Step 4: Simplify right side
    12,186.36x = 219,236,370.55
  5. Step 5: Solve for x
    x = 219,236,370.55/12,186.36
  6. Step 6: Final answer
    x = 17,990.31

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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.