Home / 31,779.72-43,858.10-18,351.54

Finding the Fourth Proportional to 31,779.72, 43,858.10 and 18,351.54

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Solution

The fourth proportional to 31,779.72, 43,858.10 and 18,351.54 is: 25,326.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,779.72 : 43,858.10 = 18,351.54 : x
  2. Step 2: Convert to fraction form
    31,779.72/43,858.10 = 18,351.54/x
  3. Step 3: Cross multiply
    31,779.72x = 43,858.10 × 18,351.54
  4. Step 4: Simplify right side
    31,779.72x = 804,863,722.35
  5. Step 5: Solve for x
    x = 804,863,722.35/31,779.72
  6. Step 6: Final answer
    x = 25,326.33

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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.