Home / 31,428.76-47,175.94-13,910.90

Finding the Fourth Proportional to 31,428.76, 47,175.94 and 13,910.90

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Solution

The fourth proportional to 31,428.76, 47,175.94 and 13,910.90 is: 20,880.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,428.76 : 47,175.94 = 13,910.90 : x
  2. Step 2: Convert to fraction form
    31,428.76/47,175.94 = 13,910.90/x
  3. Step 3: Cross multiply
    31,428.76x = 47,175.94 × 13,910.90
  4. Step 4: Simplify right side
    31,428.76x = 656,259,783.75
  5. Step 5: Solve for x
    x = 656,259,783.75/31,428.76
  6. Step 6: Final answer
    x = 20,880.87

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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.