Home / 21,222.75-31,836.15-8,743.62

Finding the Fourth Proportional to 21,222.75, 31,836.15 and 8,743.62

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Solution

The fourth proportional to 21,222.75, 31,836.15 and 8,743.62 is: 13,116.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,222.75 : 31,836.15 = 8,743.62 : x
  2. Step 2: Convert to fraction form
    21,222.75/31,836.15 = 8,743.62/x
  3. Step 3: Cross multiply
    21,222.75x = 31,836.15 × 8,743.62
  4. Step 4: Simplify right side
    21,222.75x = 278,363,197.86
  5. Step 5: Solve for x
    x = 278,363,197.86/21,222.75
  6. Step 6: Final answer
    x = 13,116.26

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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.