Home / 21,308.97-31,968.07-8,161.35

Finding the Fourth Proportional to 21,308.97, 31,968.07 and 8,161.35

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Solution

The fourth proportional to 21,308.97, 31,968.07 and 8,161.35 is: 12,243.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308.97 : 31,968.07 = 8,161.35 : x
  2. Step 2: Convert to fraction form
    21,308.97/31,968.07 = 8,161.35/x
  3. Step 3: Cross multiply
    21,308.97x = 31,968.07 × 8,161.35
  4. Step 4: Simplify right side
    21,308.97x = 260,902,608.09
  5. Step 5: Solve for x
    x = 260,902,608.09/21,308.97
  6. Step 6: Final answer
    x = 12,243.79

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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.