Home / 31,720.40-47,654.04-19,910.96

Finding the Fourth Proportional to 31,720.40, 47,654.04 and 19,910.96

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Solution

The fourth proportional to 31,720.40, 47,654.04 and 19,910.96 is: 29,912.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,720.40 : 47,654.04 = 19,910.96 : x
  2. Step 2: Convert to fraction form
    31,720.40/47,654.04 = 19,910.96/x
  3. Step 3: Cross multiply
    31,720.40x = 47,654.04 × 19,910.96
  4. Step 4: Simplify right side
    31,720.40x = 948,837,684.28
  5. Step 5: Solve for x
    x = 948,837,684.28/31,720.40
  6. Step 6: Final answer
    x = 29,912.54

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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.