Home / 21,172.07-31,757.79-5,161.67

Finding the Fourth Proportional to 21,172.07, 31,757.79 and 5,161.67

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Solution

The fourth proportional to 21,172.07, 31,757.79 and 5,161.67 is: 7,742.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.07 : 31,757.79 = 5,161.67 : x
  2. Step 2: Convert to fraction form
    21,172.07/31,757.79 = 5,161.67/x
  3. Step 3: Cross multiply
    21,172.07x = 31,757.79 × 5,161.67
  4. Step 4: Simplify right side
    21,172.07x = 163,923,073.12
  5. Step 5: Solve for x
    x = 163,923,073.12/21,172.07
  6. Step 6: Final answer
    x = 7,742.42

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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.