Home / 21,233.21-31,849.70-5,438.21

Finding the Fourth Proportional to 21,233.21, 31,849.70 and 5,438.21

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Solution

The fourth proportional to 21,233.21, 31,849.70 and 5,438.21 is: 8,157.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,233.21 : 31,849.70 = 5,438.21 : x
  2. Step 2: Convert to fraction form
    21,233.21/31,849.70 = 5,438.21/x
  3. Step 3: Cross multiply
    21,233.21x = 31,849.70 × 5,438.21
  4. Step 4: Simplify right side
    21,233.21x = 173,205,329.85
  5. Step 5: Solve for x
    x = 173,205,329.85/21,233.21
  6. Step 6: Final answer
    x = 8,157.28

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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.