Home / 31,105.90-46,661.13-13,319.21

Finding the Fourth Proportional to 31,105.90, 46,661.13 and 13,319.21

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Solution

The fourth proportional to 31,105.90, 46,661.13 and 13,319.21 is: 19,979.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,105.90 : 46,661.13 = 13,319.21 : x
  2. Step 2: Convert to fraction form
    31,105.90/46,661.13 = 13,319.21/x
  3. Step 3: Cross multiply
    31,105.90x = 46,661.13 × 13,319.21
  4. Step 4: Simplify right side
    31,105.90x = 621,489,505.96
  5. Step 5: Solve for x
    x = 621,489,505.96/31,105.90
  6. Step 6: Final answer
    x = 19,979.79

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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.