Home / 12,164.07-18,222.47-7,991.41

Finding the Fourth Proportional to 12,164.07, 18,222.47 and 7,991.41

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Solution

The fourth proportional to 12,164.07, 18,222.47 and 7,991.41 is: 11,971.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,164.07 : 18,222.47 = 7,991.41 : x
  2. Step 2: Convert to fraction form
    12,164.07/18,222.47 = 7,991.41/x
  3. Step 3: Cross multiply
    12,164.07x = 18,222.47 × 7,991.41
  4. Step 4: Simplify right side
    12,164.07x = 145,623,207.60
  5. Step 5: Solve for x
    x = 145,623,207.60/12,164.07
  6. Step 6: Final answer
    x = 11,971.58

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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.