Home / 31,920.75-47,879.31-14,146.29

Finding the Fourth Proportional to 31,920.75, 47,879.31 and 14,146.29

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Solution

The fourth proportional to 31,920.75, 47,879.31 and 14,146.29 is: 21,218.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,920.75 : 47,879.31 = 14,146.29 : x
  2. Step 2: Convert to fraction form
    31,920.75/47,879.31 = 14,146.29/x
  3. Step 3: Cross multiply
    31,920.75x = 47,879.31 × 14,146.29
  4. Step 4: Simplify right side
    31,920.75x = 677,314,604.26
  5. Step 5: Solve for x
    x = 677,314,604.26/31,920.75
  6. Step 6: Final answer
    x = 21,218.63

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1.5x scale

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.