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Finding the Fourth Proportional to 31,794.98, 43,879.05 and 18,366.80

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Solution

The fourth proportional to 31,794.98, 43,879.05 and 18,366.80 is: 25,347.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,794.98 : 43,879.05 = 18,366.80 : x
  2. Step 2: Convert to fraction form
    31,794.98/43,879.05 = 18,366.80/x
  3. Step 3: Cross multiply
    31,794.98x = 43,879.05 × 18,366.80
  4. Step 4: Simplify right side
    31,794.98x = 805,917,516.14
  5. Step 5: Solve for x
    x = 805,917,516.14/31,794.98
  6. Step 6: Final answer
    x = 25,347.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.