Home / 31,839.13-47,761.73-13,120.43

Finding the Fourth Proportional to 31,839.13, 47,761.73 and 13,120.43

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Solution

The fourth proportional to 31,839.13, 47,761.73 and 13,120.43 is: 19,681.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,839.13 : 47,761.73 = 13,120.43 : x
  2. Step 2: Convert to fraction form
    31,839.13/47,761.73 = 13,120.43/x
  3. Step 3: Cross multiply
    31,839.13x = 47,761.73 × 13,120.43
  4. Step 4: Simplify right side
    31,839.13x = 626,654,435.14
  5. Step 5: Solve for x
    x = 626,654,435.14/31,839.13
  6. Step 6: Final answer
    x = 19,681.90

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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.