Home / 20,839.76-31,217.76-9,731.12

Finding the Fourth Proportional to 20,839.76, 31,217.76 and 9,731.12

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Solution

The fourth proportional to 20,839.76, 31,217.76 and 9,731.12 is: 14,577.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.76 : 31,217.76 = 9,731.12 : x
  2. Step 2: Convert to fraction form
    20,839.76/31,217.76 = 9,731.12/x
  3. Step 3: Cross multiply
    20,839.76x = 31,217.76 × 9,731.12
  4. Step 4: Simplify right side
    20,839.76x = 303,783,768.69
  5. Step 5: Solve for x
    x = 303,783,768.69/20,839.76
  6. Step 6: Final answer
    x = 14,577.12

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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.