Home / 12,162.63-18,220.33-7,989.97

Finding the Fourth Proportional to 12,162.63, 18,220.33 and 7,989.97

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Solution

The fourth proportional to 12,162.63, 18,220.33 and 7,989.97 is: 11,969.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,162.63 : 18,220.33 = 7,989.97 : x
  2. Step 2: Convert to fraction form
    12,162.63/18,220.33 = 7,989.97/x
  3. Step 3: Cross multiply
    12,162.63x = 18,220.33 × 7,989.97
  4. Step 4: Simplify right side
    12,162.63x = 145,579,890.09
  5. Step 5: Solve for x
    x = 145,579,890.09/12,162.63
  6. Step 6: Final answer
    x = 11,969.44

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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.